I think that number is only if you're living very very comfortably. Personally, on a normal standard of living, I can get by with around $500 USD a month, and that's normal 3 meals a day with internet, phone, apartment (no pool or facilities.) Street food, normal portions are going around $1 to $1.5 USD so it's pretty cheap.
Now of course, you might be able to only afford to go to socialize at bars and restaurants once a month or else you'll blow that budget, but it's possible.
I believe you will need a business visa to legally work here (I am a Thai national so I do not have that issue) and getting one isn't a trivial task, unfortunately.
I suspect that the OP is most likely working using a tourist visa. IANAL but it is likely not legal if caught, but if you can get away with it, more power to you.
Now of course, you might be able to only afford to go to socialize at bars and restaurants once a month or else you'll blow that budget, but it's possible.