it depends - many small ensembles are quite interested in having recordings made of their performances, but funds to support it are often limited. if you can get $150 to do a gig, youre lucky. most chamber groups are non-profit sponsored, and struggle to cover operating costs. in NYC, this may be different of course, but in the boonies, there are always people who will volunteer to record stuff like this for free, eliminating any opportunity for you to make any money at it. you will need to do some direct contact with groups you might want to work with, and establish yourself so they call on you. good luck.