Its cheaper to do bikram in a sauna half the price, I went to this banya, that has a lot of space in BA and I just did my bikrim yoga there, maybe its not safe according to teachers, who are making a very good living charging folks so much for a class, but when you are not able to pay for their high prices, this is one way to do it. Doing bikram in general is risky, its why they make you sign that legal form. So try it out, the banyas in near Carlos Pelegrini stop, and you stay as long as you want. Yoga can be practiced alone, see a teacher when you can, I speak for people who don't make a lot of money and still want the benefits of yoga, we all deserve yoga, no matter how poor you are. It seems like the rich are the only ones can afford spirituality and health.
But its not true, and we can find ways.