I think you might struggle. A lot of jobs are reserved for Thai nationals. You need to be able to offer something different. It is hard for anyone to give you advise without knowing your skills and education level
my situation is a little different as I am not planning on retirement in Thailand just extended break for over a year. So 800k I will just spend because will not be renewing visa . As I say my situation is different from most peole
yeah I agree you can show it your home country so definitely would suit some people . I am personally going to do the multi entry retirement visa next month when I'm in Thailand