Welcome fellow fighter!
How many years training bjj? How much of your income that price represents?
I'm in purple belt and moved to a small city some time ago (beginning of 2010). There is no brown or black belt in the city and I should say the few purple belt are low on skill. So I'm starting my own group of training. The number of people are starting to grow. There is around 16 or 18 people that came at least one day. I had 12 people in a day. That's 0.1% of the city population! :-) We have no roof yet, so we are fighting in a tarp over the grass in a public space (kind of a soccer field). I'm there for 2 or 3 hours a day, depending on the presence of at least one more person to stay more. It's hard to keep learning so quickly as before, as I don't have much challenge here. But its my only option now, I chose to move here and I don't regret it. I hope to go to nearby cities on occasion, so I can learn more. I'm not paying to fight anymore, but I'm not getting payed either. I want brown belt by next year. I'm not sure if I will get it.
I'm heavily biased to give you some opinion on your expense related to jj. I don't think you should stop training because of money. But maybe there is some ways to pay less or to get back some money. I would still happily pay for the opportunity to fight some more skilled people. But in the past when my schedule didn't match with the gym's schedule, I bought some mats (3x3m) and brought training partners to my home when they could come. But there is a problem. When you are beginning, anyone represents a challenge and can be of great help for your learning. As you keep at it, there is less and less people that could make your training challenging. And I'm only purple; I wonder how hard is for a black belt to keep himself challenged (unless he lives for bjj).