Thailand, as most of the Asian countries are cheap. You can find accommodation, be nourishing and move for 400 bts a day (that is approximately 10 $).
For the accommodation, you will find a large number of cheap guest houses. But prices can be of the simple in the double according to the period when you go there.
For the meals, you will pay out approximately 3 $ for a menu with drink. They can cost 15 $ maximum in the more smart restaurants.
The temples and museums tickets cost from 40 to 100 bts.
Destination
How much does Bangkok cost.
Some tips on getting the most out of your money in Bangkok