if you are already a Cfi I would have to say go to a full time regular college, don't get an airplane degree and instruct on the side. I know of folks that have done this, myself included. I went to a big twelve university and had a job with a regional lined up before I graduated. When I graduated, I had about 2000 hours of which nearly 600 was multi. About 1200 of that was cfi time. If you are worried about having enough free time, I can assure you that if you manage it well you will be fine. I had a very active social life in college and was very active in my fraternity as well as other campus activitys and still had plenty of time to fly. It did take me 5 years to graduate but I think that was mainly due all the fun I was having rather due to flying. I did a lot of studying at the flight school between students. I also flew a pt 91 corporate cessna 310 for a medical company in addition to teaching and I would do school work when I was sitting at random fbos waiting on the guys. It's all about time management.