Okay, I had a friend from college who did this.
IF the school you are excepted into has dorms, married student housing, etc...you need to take an apartment there. Stay during the week and try your best to arrange your schedule where you can take classes M-W and T-TH. Then you go to the college on Monday after kids are in school and then come home as soon as classes are out on Thursday. Even if you can't get out of a Friday class it's just a few more hours there. If all else fails....take at least one of the kids with you and leave the other for hubby to deal with. In this instance you would want to take the child that may need the most attention. If he has a seizure you want to be there and if he's in the same town, maybe even within walking distance, you can be there in minutes.
She found that the time they spent together as a family on the weekends was more focused and special due to not being in each others faces all week. The tedium of parenting, the "Pick up your clothes out of the living room", "Take out the trash", etc...all stopped and the whole family was much more at ease.
She paid, in the 80's, about $400 per month for a fully furnished apartment with all bills paid including land line and cable. I lived on campus too and had a wonderful time. In a college town the schools have the best teachers due to the professors and other college employees having more money...they can put the kids in private school easily so the public schools try harder to attract them with exceptional scores into staying with public education.
I got financial aid while I was in college and before I ever got a single penny every single bill I had, from books, tuition, football tickets, yearbook, etc...was taken out of my money. Every penny of my check I got each semester was "Play Money". It had not purpose other than to allow me to treat myself to things like a new sewing machine, a different car, a few long weekend trips with someone fun.
I wasn't married and didn't want to take the kiddo so my friend from above and I went to a few places to just get away. She's like a lizard and always wanted to go somewhere sunny to lay on the rocks and burn to a crisp. I like the mountains and snow.
In other words I am saying you should check into the married student housing. It is for non traditional students who don't really want a dorm life existence. I would say this in what I would do if I had older kids and wanted to start a new chapter in my life.
I am excited for you. Good luck!!!