I purchased Abrams after graduation, but I had wanted to get a pup my Junior year. College schedules are actually REALLY nice when it comes to having a dog, especially once you hit your last two years. You can either get your classes scheduled so you're only attending morning or afternoon classes, or have breaks throughout the day that you can swing back home for potty breaks/play time. My senior year I had my own apartment, was working full time, and going to school part time...would have been a perfect time to have a dog, but Michael (who was then my boyfriend) said it would be best to wait for his sanity, so I did.
Michael had Cynder all through college. He was in a dorm his freshman year and his mom kept Cynder, but after that he moved out into a house with roommates and had Cynder with him. Granted, she is like the perfect college-student dog, but he and she got along just fine.
My friend, Michael's roommate, had two dogs and a cat throughout her entire college life, too. Both Michael and my friend worked part time jobs to help cover expenses (student aid helped with the rest) and they both found the time for their dogs/classes/jobs/social life. It isn't as hard to do as you'd think it is, especially if you have a good dog.