Have seen good results from App Academy (in NYC in particular) - they follow the business model that I mentioned above. I don't know the details of all the bootcamp alums on my team, and am also unfamiliar with the tuition structures of different bootcamps. My info is also about 2 years out of date.

IMO these bootcamps are producing a basically undifferentiated product curriculum-wise (which, by the way can be learned via self-teaching on the internet). Only a few have real brand recognition. Drive, curiosity, raw horsepower, etc are a lot more important.

For specific pointers: your cousin should speak to as many recent alumni of various programs as she can to ensure that she has a legit program on her hands. Speaking with hiring managers is a good bet as well; "I've never heard of that place" is bad; "That place is a scam" is worse. She should also ask what the pass/fail rate is for students in the program. High graduation rate + upfront payment is arguably bad (shows they're incentivized to just get you out the door).

Best of luck!