I was single during school and lived by myself, and worked one and sometimes two part time jobs during vet school. I would take care of the lab and teaching animals on weekends (horses, dogs, mice, pigs, etc), and 2-3 days out of the week I was an after-hours emergency technician at the clinical pathology lab. I found it pretty manageable, but then again, I wasn't a huge crazy MUST STUDY person. I studied perhaps 5-10 hours a week. However, a lot of people, most I would say, studied more than I did. I am just a crammer, and it works for me - the pressure helps me remember things long-term. Other people retain things better by repetition - we're all different. It was pretty much just extra money for me, since I didn't make enough to put towards real expenses like rent.