@Wylie ******
easier if you get married in the states!
You arrive as a student or visitor on a 6 month visa !
Then you get married!
I visa status change from visitor to married to a USA citizen can be made through an immigration attorney in the USA!
If you get married in Thailand she can no longer ask for a visitor visa and then claim she’s married as the status is known before travel which puts you in a ambiguous situation!
It’s become really complex in the USA and I strongly suggest you get a god immigration attorney!
The one you want to seek out are the ones that retired from US immigration, as they intimately know the process and people within the system.
If you try to do
It yourself you run a high risk of refusal!