To open a Thai restaurant, the most important one is the chef and the other is the Thai food. You don't seem to have mastered these two points at present. The cost of Thai chefs is very high, because Thai people have lower requirements for life, so they don't like to leave their homes very much. A chef earns a good salary in Thailand, and he wouldn't like to come to China if it wasn't expensive. Your conditions are not so good, so it should be more reliable to go to Thailand to study, or send relatives to study, and then come back to open.