I don't know. If someone stays five years they're going to be spending money somehow. I know people who have got the five years just on dental treatment. The visa doesn't have the reason mentioned. Just the finish date, which is five years. All you have to do is keep bouncing and stay away from immigration! The sources I have are people who are doing it, not talking about it!
I'm talking about the interest I'm missing out by not having my money invested in Australian Super. The 800k must stay in the Thai bank account paying 1% interest until the day you die. The 65k transfer you can spend as soon as you get it
Start off with OA visa, which will do you for two years without having to transfer 800k into Thai bank account. During the two years start transferring 65k into Thai bank account every month (you can access and spend this immediately it registers in your account). By the time the two years is up, you will have sufficient monthly transfers to qualify for the O retirement visa. You will need to exit the country, come back in on visa exempt, and apply for the 90-day O visa. With thirty days remaining on this visa apply for the 12-month extension. Whatever you do, do NOT miss even one monthly transfer from overseas. Keep this regime going indefinitely, and extended every year