I just completed my MBA. DS was 9 mos when I started and is now 26 mos. It has been one lonnnnnnng, hard f'ing haul, but here was my hard, fast rule:Going to school is the same as working full time.
Ok, so that rule got bent, a LOT, but it really helped. I don't know how you feel about childcare, but I realized that the only way I could push through was to treat school like work and so DS went into care at around 10 1/2 months. He had been home w/ DH before that, so he got a lot of really good one-on-one time. (Financially it wasn't an option for DH to stay home while I was racking up $$$$$ in loans!) We worked hard to find a good place and got recommendations from other parents before we signed him up. I was heartbroken, but DS was so happy there! It has been a really great experience, actually.
Basically, I would get up, get him ready in the morning (so we got lots of cuddle time) and take him to daycare, which was near my school. It was a longish ride, so we got time to sing and talk in the car. Then, when the day was over, I'd pick him up and bring him home. Once we were home, I was done with school for the day. We spent the whole evening focusing on DS and then, when he went to bed, DH and I tried to have a little time. I was still BF'ing, which helped with the connection (although DS self-weaned at around 12 mos.
I made sure that any group project I was involved in was scheduled well in advance so that if there was no way around it and we had to meet in the evenings or weekends, I could make arrangements w/ DH and pull some time w/ DS from another part of the week. Since it was easy to tell when I'd be really busy (finals, etc.), DH and I worked out an schedule where he really took on a lot. If I just had to spend a Saturday studying, DH would take DS for the day and I would head off to school. Then, the next day, I would take DS for the whole day and really work on quality time.
Ladies, what we are doing is probably the hardest thing in the world. To be in school with a partner and child(ren) is a testament to how strong we all are! Kudos to all of us!!