Suggest you come first and see if thailand is a place you really want to retire to if you have not spent day to day time here before.
E-visa or go into your local Thai Consulate and apply for a tourist visa. Try for a 3 month so that you can open a Thai bank account to deposit the 800k which is requited to hold a Non O (based on retirement)
OR
As US citizen you can get a Visa Exempt entry stamp for 30 days that can be thst can be extended for another 14 days. You can do a border run and get another 14
days.
You can do visa yourself or go through a agent here.
Just come first and make sure you will be happy here and is where you want to be.
See an agent now. The 800k in a Thai bank needs to be in there for 2 months prior to having a Non-O Retirment issued. So not enough time given that she is on an extended visa that has 25 days left on it. Perhaps she can get that extended further given her situation of just waiting for the 800k to marinate. Yes, she can do it herself and it is more or less (I fear less in this case) straight forward. But if she cannot extend, and it is not a given that she will be able to, see an agent this time and then yourself later?
Thanks everyone who responded to this issue. I have just been trying to help some folks out that contacted me about it. Some were a bit panicked other just pissed off at not being able to get any answers from the US Missions here without them using words like "Should", "Approximately", "Perhaps", and my favorite ones that someone told me, "Not sure". But thanks everyone.