OFCOURSE they're awesome little things, i dont have any but my friend just got a pair and they're are mean little things! haha made me wanna get a pair too!
Depends, are they available at every lfs near you. If so you may have a hard time getting rid of them unless you just want to do it for your own enjoyment.
Any fish you are interested in is worth raising and breeding! Just don't expect to get rich off them. Personally I love them they are beautiful little tyrants!