If you ask people about it, means you don't trust basically your wife.. its undermeaning. So dont do it, or enstablish a company and let business be in a company name.
It's unsense to do it, early retirement visa costs 5800 baht per year( multi re-entry), or even cheaper , if you not use to go out often, 1900 baht plus every time you go out 1000. Why to buy 600.000 baht in advance per 10 years...?