Maybe you could look in the paper or online for someone who is looking for a roommate. Perhaps you could borrow the money for the first month and then get a job or have one lined up by the time you move. It would certainly be easier to share rent than to pay it all by yourself----and, furniture and cooking supplies and things would most likely would already be there, except a bed for you and your kids.
You don't want to get into details, BUT----plotting and planning and sneaking away and just not being there one day when he shows up isn't a good thing to do, especially with 3 children. Unless you can prove that he is abusive to you or the children and is a danger to you or them, it is just a BAD IDEA. He can allege that you kidnapped them. If "things" have been bad for a while, and they don't get better, then he must know it too. "Things" in a marriage usually are not bad for just one party----both people are usually miserable and want out or want to work on things. Your husband CAN'T kick you out if you have been living there legally with him and the kids. Just upping and leaving is not a good thing to do, IMHO. If things are THAT bad, and you are THAT unhappy, he obviously must know. And, if you sneak away and leave one day without any notice, he's is going to be PISSED, and it won't make things easy for you when it comes time to talk about temporary child support or alimony. And, once you "leave", do expect that the locks will be changed and you won't be able to get back in. He can't "kick you out", but if you leave, he can certainly "keep you out". It is always my policy that things are always better if they are talked out, no matter what the end result is.
Open a bank account in your name only----or better yet, if you can open a bank account under a family member or friend that you can trust, do that. This way---he has no claim to any of the money in it. And, remember---just because your name is not on anything (the house, bank accounts, etc.) doesn't mean that you are not entitled to any of it in a divorce. I don't know what state you live in, but in *most*(some being more "liberal" than others), you are legally entitled to up to half, sometimes more, of whatever income has been generated and saved during the marriage; you are legally entitled to half of what the house is worth if it was purchased after your marriage (no matter whose name it is in) and if it was your husband's house before you got married, you are entitled to at least 50% of the equity that the house has gotten since you got married; you are legally entitled to half of what the car is worth----pretty much, anything and everything that you and your husband have, you are legally entitled to half of (sometimes more, depending on the state you live in). Your work in the home/household---although, perhaps, your husband does not appreciate it or think it is worth much---is looked on in a court of law as an "occupation", and your "contribution" to the household is definitely taken into consideration in a divorce proceeding. Men hate it---but, that's what happens. I read your other posts, and you were pretty clear that you do everything in the house and your husband works at home. Taking care of a house and 3 children is quite a responsible "job", and in the "real world", it would garner a very sizable salary!!
I guess I shouldn't be asking this, but---why, and more importantly, HOW, have you gone so long without a bank account of your own? I understand you don't have a job so you wouldn't have any income to deposit into it......but, do you get an "allowance" to spend? You mentioned having a credit card for groceries----can you use that credit card to do things that you want to do? How have you gone so long without your own car, bank account---it sounds like you have allowed him to control you for a good many years. It is time to take back the control of your own life. And, just MAYBE if you talked to your husband about this, you would actually be able to get some of your independence back and feel better about yourself by having a job.
In one way----you are actually very lucky in that you get to stay home with your kids and your husband makes the money to support the family--you must realize that if and when you leave, you will have to work and put your kids in some sort of daycare when you are working, and you are STILL going to have to do everything in the house!! Your time with your children will be greatly reduced, and if your husband wants to be a PIA, he can give you a REALLY hard time as far as child support and alimony goes----and he could fight tooth and nail that you should not get any alimony because you are young enough and able bodied to get a job so he should not have to support you. I don't know what he does, but I get the feeling that all the bills are paid for and you don't need/ want for anything, even though you don't have your own car or bank account or anything. Have you ever talked to him about having your own checking account and putting some money in it every week or month--you know, "mad money"? Or, have you ever talked to him about getting a job? You mentioned that you worked before.......maybe you could work again and make your own money. It is only fair that if you were working that you contribute toward the household expenses....you would expect it if he worked that he would contribute to the expenses, so it is the same for you...but, he can't "make" you do anything, and he certainly can't steal your money. If you had a job, you could have direct deposit and he wouldn't be exposed to how much you make or anything. He would have *NO* control over that money whatsoever. But, it sounds like he has a whole lot of control over you, for whatever reason that may be.
Without any "resources", like family or friends that can help you, you are pretty much left to go to a shelter---and, if you can avoid that, you probably should. Like I said---you haven't given much information on the why's and how's, so it is hard to give "advice"...........if you are just generally unhappy in the marriage, then chances are, he is too. Maybe he is afraid to talk to you about it--I don't know. For the most part, just sneaking around and all of a sudden leaving is a pretty lousy thing to do---and, your ability to qualify for any "emergency" assistance would probably be slim unless he is abusing you or the children. I don't think that just because you were unhappy and felt like leaving would qualify as an "emergency". However--abuse does.
It's hard to answer when you don't want to give an "explanation" about your siituation........however, I think everybody on here would agree with me that if he is abusing you or any of your 3 children, you have to get out of there IMMEDIATELY, no matter what----and staying with your parents or a friend or even a shelter is better than enduring any sort of abuse from ANYONE!!