If you like to come to Thailand a lot or living in Thailand with money that you did not get from your pension then you are according to the Thai government not a welcome guest. The Thai government does not want people hanging around in Thailand spending money they only want tourists that come first time and spend loads of money and then bugger off.
People that stay to long know to much and do not spend to much money and the Thai government have from the 1 October this year made it very difficult to get a visa.
If you going out of the country and then coming back with no Visa and no ticket the airline can even stop you from boarding the plane. You need to have a travel plan out from Thailand within the visa is due.
Then it is good to know a good travel agent that can arrange a fake or temporary ticket that you cancel as soon as you come to Thailand. If you travel agent can not fix that for you change and get a better one you life in Thailand depends on it.