A word of warning:
be really careful with the thai boys! they're friendly one day and utterly violent the next!!!
A life doesn't count much
Most of the young hooker girls have a local pimp guy behind them - so if it's really illegal to do porn you might open yourself to some very nasty blackmailing (which might very well involve the local police) - boundries are very blurred in Thailand.
I touted once (and once only) for a beach losman and as a result had half the island boys after me - needed the protection of kick-boxing gang of four to get me of the island unhurt...
I know an american who had a beach restaurant with his thai wife. At some stage a local developer wanted their spot, but since their land title and operation were legal because his wife was thai they simply abducted their 2 kids, and to make their intentions clear first send a finger and later killed their son. The couple finally sold for a song just to get their daughter back...
It's a fucking violent place behind all the friendly smiles! Even with drugs you'll have to be cautious.