Simple fact is that it is not an inexpensive hobby in any way. Even if you made it past the set up cost, you are still looking down the road at regular water changes (need salt mix), food, fish, etc. In this hobby a single fish can easily cost $30-$50. And smaller tanks are not easier.
your best bet is to find a local reef club and see if anyone is selling a used system. But realistically, $200 is pretty low. You might be able to do it, but you'll need additional money down the road as well. Just keep that in mind.