Yeah. First she needs a Thai bank account as everyone suggests. For shopping at grocery stores, mall stores and restaurants I use my USA Issued Barclaycard which has no conversion fees. I pay it remotely here In Bangkok on line monthly.
Marty. A reminder to bring an extra passport size photo because when you go to immigration for the extra 30 days you’ll need that. And another for the next 60 plus 30. They use a glue stick to attach it to your application. Also have your TM 30 info (your address in Thailand for that application. Bring 1900 baht cash. Get there early because it’s like a DMV. Good luck Sir.