Try using a facility like the Y or a community center that is low or no cost for students, or do your working out the old fashioned way...outdoors in the fresh air. Take lots of Yoga classes to activate Get Paid to Do Yoga and before you know it your cost will be low enough that you can do both if you still have the energy
From someone who is a runner, a biker, a swimmer and a Yoga teacher.
Peace!
Stephanie