the bank financial regulation have been tightened this year, I doubt an agent can bend the rules like they did, and less the visa is obtained legally you might find your have troubles later. Its a different world now.
best to go for a over 50 non o (retirement) visa, you will both need 800kthb in a Thai bank for 2 months before you apply. Unless you have a Thai bank account you should apply for your visa in the USA, assuming your wife not Thai.
What visa are you considering? And do you have a Thai bank account? If you dont and need to keep money for seasonings, you can not open a bank account as a tourist and therefore need to get your visa in the USA