Your hours alone are going to burn you out!! It sounds like your on the fast tract if you keep going the way you are. I keep saying in my threads and comments about burn out but, I've met a few providers who shared their stories with me about burning out. Too many hours and trying to do it all. We can still give 100% to the daycare kids in our care and our selves and our own families which in the end, will make us better providers by not being so stressed out.
You should weight the pros and cons to going back to work in a center and or keeping your home daycare open and do what is best for you and your family.
I think if you made some adjustments to your daycare, you may find things become less hectic. Change your hours would be number one. You can serve healthy foods without breaking the bank ~ the ladies have a thread in daycare bear where there are some great ideas that aren't going to break the bank. You need to stay competitive in your area for what you charge....are you? If you can put your daycare in one spot in your home- DO IT! Not everyone has the set up but it sounds like you do!! We bought our house with the daycare in mind to keep it a part from the rest of the house ( our last house we used our front hall and dining room which we all had to walk through to get to the rest of the house ) What a difference with it in one area of our home. You can walk away from it if you need to and come back to clean up when you have time at night!! The rest of our home is kid free and clean- except our own My husband can walk through out our home without kids under his feet.
It may be tough to tell your current families that your changing your hours but, don't forget that if they had to pull their little one out if they lost a job/moved and or found cheaper care.....they won't be keeping their little one in your care as it's not a fit for them anymore. The way things are going for you, isn't a fit anymore for you. Keep in mind that your making changes to not only better your family but yourself which in return will make you a better provider.

Good luck!!