Like your post.
LTR perhaps suits some folk however similar to yourself I have just placed the 800k in Thai bank and leave it there.
Don't give it a second thought.
Annual extensions are simple and use appointment option.
In future when mobility becomes an issue, I will switch to agent.
Everyone has options that suit their situation.
Credit to Thailand for providing those options.
I'm sure some folk will continue to view PE visa as a good option especially for those some years under 50.
Basically a flop out the cash ...deal done.