If I were to take a trip to Bangkok for around 1 month how much money would be reasonable to live off?

Agree with the other guy. Depends how many girls you want to do a day. If you are taking them from a Go-Go Bar that will be Baht 1,500 for the bar fine. If she is any good she will want Baht 2,000 for a short time, Baht 4,000 for long time. If you are picking freelancers up from the clubs Baht 3,000 for the night would be OK. Plus drinks let's say Baht 6,000 a night. For a month that's around Baht 180,000 or US$5,500. You'll need to factor in viagra, condoms, somewhere to sleep, and food to keep your strength up. So uming one girl a day I'd budget for US$10,000 at least.