I do not know how old you are or how skilled you are, and even lucky and easily get good valuable connections, because all that you will need to survive in Thailand. You need a safety net, and with little resources, small problems have an tendency to get real big.
Spend a few more years in Europe or elsewhere you can have well paid work, have patience, and Uild up an largge enough buffer to manage to build something in Thailand.
Thumb of rule: You will need 3 times as much as you plan to use + safety money.
How old are you? And why the rush?