Do your best but you have to write it off as the cost of doing business. The system has been severely abused since the beginning of time and the people who don’t game the system pays for it.
I believe it’s only 650K for the Bronze tier. Technically a 5 year visa for a bunch of Baht with no other “privileges”. A friend just got a 10 year Privilege, unknown tier, for $40K all in through an agent.
I said it was the most economical visa for your circumstances, being under 50 years of age.
I use an AIS eSIM. I also use a T-Mobile physical SIM. Have had the US number over 2 decades for $3 a month. When I go to the us I activate a different plan while in country. Even with the $3 plan you get all the bank codes and stuff via SMS at a dime each. It is a prepaid plan. iPhone 15.