I've lived and built two companies in Thailand over the last 14 years. Before your pop your Macbook Air in a backpack, read my points. 1. Bangkok is not cheap. If you want to have a life that resembles anything you're used to coming from a Western country, you're going to live in Bangkok and you're going to live in a relatively expensive part of the city. Yes, you can live in a concrete block with plastic furniture a…
Re: western food, I think it's obvious that if you're looking for Western products, you're going to pay more than in the West. You're not in the West after all! It's a bit spoiled to expect Western food to be the same price as in your home country. However, if you can assimilate, live, eat and drink like a local, you can live very cheap.
That's why I stayed in Chiang Mai. It has low rent, low cost of living, abundant nature and countless of coffee places to work from.
Re: sex workers, I don't know if you're in my age group (I am 27) so YMMV, but if you go clubbing in Bangkok or Chiang Mai, you will run into prostitutes. Everywhere.