Yes, $1650 is almost twice what we make each month. So it's definitely doable!
That swamp cooler thing sounds awesome. Too bad we live in such a high-humidity area!
My kids get a few new clothes for their birthday and Christmas, and maybe a few (extremely needed) items for back-to-school. That is it. Other than this, we don't really shop for clothes. I've never found it necessary to have a monthly clothing budget. When your kids need (NEED! not want!) new clothes, buy a few things then. If they've outgrown their jeans, that doesn't mean they need a whole new wardrobe. It's not a bargain if you don't need it.
I never coupon, (unless I happen upon a really good one) and there are a lot of things I refuse to buy generic versions of. Like dish soap, for one. I find that with generic dishsoap I have to use two or three times as much as I would use of Dawn. And Philly Cream Cheese is the only kind I'll buy because the rest is revolting. (Unless it's just going in recipes. Then the cheap stuff will do.) But we buy generic of most things.
Make your own soups and chilis and stuff. Skip cereal for breakfast. Oatmeal is much cheaper and more filling. There are a lot of REALLY simple meal ideas you can do for busy evenings. My family's favorite is pancakes for dinner. Tacos or taco salad is also really easy. Bean and cheese burritos make really simple snacks (or meals), and are much cheaper than the prepared version. (Just keep tortilla shells, canned refried beans, and some cheese and salsa on hand. Veggies if the kids will eat them.)
You definitely seem to have enough money that you don't need to completely go cold turkey on everything, or start making every single thing you eat from scratch, or whatever. If you are not in desperate financial times, then you are probably fine. But everyone could use more savings, and spending just to spend is silly. Good for you for taking this step!

