@St***
brings up an excellent point
@Ma**
, other than the thai consulate in Vientiane Lao, the other thai consulates in neighboring countries require some or all of the 3-proof-ofz;
proof of 20K baht (or the equivalent) in a bank account.
proof of onward travel
proof of a hotel booking or confirmed lodging
Check the requirements at the thai consulate where you're going to go to get your tourist visa.