Ruth-(((((HUGS))))
You have so much on your plate!!
I have endometriosis stage 4,and depression and anxiety issues. So, some days are better than ever, some arehorrible, and some are baaad. Let me see if I can help a little.
DD is 8yo and ds is 3.5yo. I have HSed dd since Kinder. She is in 2nd grade.
~Some days I don't have a break at all-right now my dh is working from 6am-8pm M-TH. I feel like a single mom in some ways. On the days that I don't get much of a break, I try my hardest getting them both to bed really early. If I do get a break, it is because ds takes a nap-this is almost everyday. During that time, I will cover any one-on-one hsing time I need to do with dd,keeping it short. Then I either walk on my treadmill and/or rest,read or come here. I rarely do housework during that time-so yes, my house is always messy. Usually when they go to bed, I follow shortly after-as I have to focus on my sleep.
~Since I have no family here, I will do my errands on the weekends so dh can stay with them. Or I ask friends for help.(Hey!Are you going to target or co-op? Can you pick up such and such for me?)
~I don't get a lot of time to myself. Our schedules and my health don't really allow for it at this time. I settle for less you could say. I do have a lot of people ask me "how I do it", and I don't really have the answer, I just do it. I suppose I lower my expectations, and live a simple life. My idea of getting time to myself, is escaping the family for little chunks. I will stretch my errands to include a stop at B&N to browse,go to a few thrift stores(this is actually relaxing to me), or just go to my bedroom and use my free mins talking to my sisters or Mom or StepMom. Since I have panic issues, I don't like to be away from my dc for very long-mostly ds since he is so little. My dh is deaf in one ear, so I rarely leave ds with him for long.
~I can't answer whether it would be too much for you to HS. Perhaps you have to try it for a year to find out? Given that you are a single Mom, and you have older and small dc, I would think it easier to HS all of them, instead of having to meet schools time schedules and your own. Your 10yo could read to or play with your ds while you do HSing with Hannah or clean house. I think this issue is really a give and take. For myself, it would be impossible for me to put my dc in school at this time. I would be a teachers worse nightmare as I would question everything. I would never get my dc to school everyday. And on the days I did, they would be late. My sleep comes before just about everything. I am of no use if I have to get up and get going to anything early. I have a hard time getting dd to ballet on Sat. mornings at 10:15!!

From speaking to friends, there is a whole bag of troubles you get when you put your dc in school. At this time, I would prefer to deal with my own troubles than others AND mine! I schedule our schooling (or at least how we do it) accordinbg to my health-and I don't discuss this with dd as I don't want to make my issues hers. For ex: last night, I had severe pain over my right ovary-absolutely debilitating. Today, my body is in recovery mode, as I only treat my anxiety/insomnia issues and not any pain issues. I regulate how I am doing by the severity of pain I experience. So today, both dc are sick with colds and/or allergies, and we have done no schooling. We normally don't watch tv M-F, but today is a tv day. I feel no guilt, as I am confident that we will make up for it later in the week.
~HSing is a big business. You can spend thousands or you can spend a couple hundred$$$'s. I buy almost everything used,so that helps a lot. IMHO- all you really need is a library card, and the internet. I know, as I have a friend who unschools, and those are her top 2 tools for education. But, you really need to hang out here or other HSing boards to learn about/hear about various curricula.
~Since you are a person of Faith, I would say to pray about it, and lower your expectations. Hannah could have been done with schooling at home with all the time she took to agree on something to wear! I spend about 1.5 hrs with dd and she spends1.5 alone reading or doing math.
FYI-your Hannah sounds like my dd!!!! :LOL

And......this post was a mommmy break for me!!! Thankyou!!!
mp

