You are right you need to keep a minimum balance of 400,000 BHT at all times. Three months before you renew the balance has to be 800,000 BHT. After two months the balance can go down to 400,000 BHT again. You will need photocopies of your bank book now going back 12 months. Don’t forget Bank letter and your bank book updated on the day you go to immigration.
Check with immigration as now they want copies of your bank book dated back 12 months plus updated bank book on the day you go to immigration plus letter from your bank
Before COE is issued you need to send Passport copy Visa, insurance,ASQ hotel airline ticket Fit to fly and COVID negative test you need before travel 72 hours
My wife checked out from the Maple Hotel Dec 27. She was very happy with her room King size bed balcony and nice bathroom with shower and tub. Staff was very friendly and attentive. Only complaint was the menu. But the staff did their best to reheat the food. Only. 33,000 BHT
Everything and any thing is possible. Nothing is as you would imagine. Paying the Pied Pipper is worth it until you are renewing your Visa the next year.
The fees you give an agency would get you a Retirement Visa in less than 10 days when you do not have all the requirements to get the Visa. Read between the lines.