I just contacted the Thai embasy in Vietnam , the recorded message said I needed to have 65O USD spending cash and it was a 60 day tourist visa , I believe that can be changed in country. May be it is where you are coming from and the visa applied for. I honestly am clueless, but it may be of help, especially seeing as what
@Jason *****
said. I am sure someone else can shed light on it , but i guess you want to be there so maybe look for a lower stay and deal with it in the country , I honestly don`t know tho, only trying to help