Wouldn't it be kind of obvious that someone is transgender? Does anyone know anyone who is transgender but it wasn't obvious before they came out??
To answer the question, I honestly don't know. To me it's a more serious matter than homo/bisexuality because someone believes they are a gender that their body suggests otherwise. How is that healthy for anyone?!
I would not pay for any transition surgery because I honestly don't know if that's the right thing to do. If they are sure about a transition surgery, I would beg them to wait until they're at least 21, because there has been cases of people having transition surgery and regretting it afterwards, so I have to make sure that they are sure.