I have no idea what your escorts cost back at home (NZ?). I don't P4P in Pattaya myself, but I've been out on the town with many friends visiting who were not on tight budgets.
Of course, the prices vary greatly, but you must pay the fine and then negotiate with the girl. I'm talking about taking the girl out, not in an ST room. Factor in rounds of drinks, and 5000 won't get you much. The point was that if you want a big night out in Pattaya, with lots of barhopping, 15,000 wouldn't be enough. (this was in response to one member freaking out because the Canadian had 15,000 of cash on his person when he was robbed).
Of course, locals can "survive" on much less than that LOL. It's a reason why dating apps are so popular these days, and then there's always the "coconut bar" option for punters on a low budget.