Yes ... good luck if you manage to make $1500 last 3 weeks ... Id love to hear how you do that!! I guess if you dont plan to buy much or do too many day trips, then you might make it last. Certainly, there is very cheap food out there, prob as little as $1 or $2 a meal from street vendors. The cheapest restaurant meal we got was about $5 per person including food and drink, thats at Thai places, but still really yummy food. If your b'fasts are included, then you shd eat eat and eat then!! You may not need lunch!

As for accomm, I know it can be very very cheap too. Even where we stayed (Patong Merlin) it was unbelievably priced (package price tho) I think it worked out to about $30 per person per nite with b'fast included! There are of course much dearer options than this, but I know there are also much much cheaper options as well. I have only been to Patong and BKK, so cant really comment on the other places youre going to.

So ... maybe your budget will stretch! If you plan to do day trips, they will cost you around $50 per adult (with lunch included)

Kitty