I don't know if the other office you refer to is Phetchaburi but after 8 years on the O-A I had to show funds had been transferred from abroad. Wasn't a big hassle as I mark my monthly as a foreign transfer with Wise. 😊
Congratulations you have again got lots of conflicting information. "Buy a cheep flight out of Thailand within 60 days". "Don't worry it won't be a problem". And a few solutions in between. Unfortunately the people giving you the advice aren't giving you the full story, that is which. Airlines are asking for a return flight and what route they are being asked on.
.call the airline you have booked with or better still intending to book with and ask them what their policy is then make your decisions on that basis.
You will not have an issue at immigration. The only people who may have an issue at immigration are those that have spent an excessive time in Thailand, basically living in the Kingdom on tourist visas and visa exemption entries.
try all the banks but try Bangkok Bank first in each of the venues. From experience they are the best bank for dealing with immigration issues. Because you have a long term property it should be possible. If you can get a list of requirements post them and I am sure people will be happy to help you meet the requirements. This is Thailand there is always a solution. 😊🇹ðŸ‡
I understand exactly what you are asking. The only solution is to get the original text in Thai and get a competent translator to answer your question.
If you need a competent Thai-English translator message me directly.
the website is a bit misleading. It does indeed say 3 days processing but in the Q and A section it clarifies that if you apply on a Monday your visa will be available on Wednesday.
I have been luck enough to live in Cha Am for 8 years now. In that time have interacted with many Government departments. Up to how it has been a pleasure to deal with them all.