If yoh have one month, don't just stay in Thailand. Why don't you try and explore some of the neighbouring countries? There are lots of cheap air tickets available from Bangkok with all the low cost airlines like Air Asia or Nok Air. Also the traditional airlines flying into Thailand have some cheap deals available. Try
http://www.moxtravel.com to compare the airfares and flights of airlines. You can also book your air ticket online. And the hotels you can get on asiarooms.com of course. My secret tip: Try Myanmar!!!