The ways in which Jewish musicians can make money, and their potential audience numbers, are far more limited than those for non-Jewish musicians. What the latter does is not a basis for expectations of the former.
There are ways to listen to large amounts of Jewish music without great expense. They just can’t help you make a mixtape CD (which is also true for non-Jewish music).
(If you have the time, you could always audio-record the music you
want playing from a free source and then put that audio onto a CD,
though this might well result in quality reduction.)