Hi Holly,
Do you have a PS2 or Xbox? My son has several of the Dance Dance Revolution games and two dance pads (about a $40 investment, but less than a gym membership and you can do it at home). The games have a workout mode that you get to select your level and listen to music and (kinda) dance. It isn't really dancing but just moving your feet to keep up with the screen but it definitely works you out. I plan to start using it as a workout as soon as I am cleared by the doctor. Just a thought.
I hope you find something that fits into your lifestyle and that you can enjoy. If you can do that, you'll be set for life.
Angela
Lap RNY 5.12.05