50k per month barely gets you a one-bedder in a nice part of Bangkok. eating out here ain't cheap either, especially if you like good food at nice restaurants and bottles of wine to wash it down.
I'm talking real good food not bugs 'n grubs or rump steak LOL.
as for vices, well 30k per month doesn't get you much if you really want to party. 30k per week maybe. it costs a lot to "ring da bell" or buy tequila for seven girls at at time.
sadly my budget doesn't quite extend to ALL of that so I'm living a fairly humble existence on 90k per month.
I don't have a car either but given that I drink a lot and Bangkok traffic sucks I think I can be given a pass in that regard.