Money needs to be in a Thai bank account for 60 days before you get extension. You are cutting it close, if not too late. Get a list of what you need from the imagration office.
let us say that GROK wandered into the camp of the UROK TRIBE some 2000 years ago. They simply cracked his head open. He brought nothing to the table, and the Urok had little kids to feed. Just philosophical musings from me to you.
Don't know what your supplement plan is . Medicare Plan C is a private company of your choice. Some plan C cover limited care for tourists in other countries.