For quickness FedEx or DHL. Thai Poste delivers quickly to USA,however it usually takes another two or three weeks for USPS to deliver in my experience.
I agree. Self insure. With a history of an internal carotid artery dissection you are at very high risk for a stroke and especially if your hypertension is not under control. Your premiums will be very high if you are lucky to be insurable and you are correct regarding your history of hypertension. Cerebovascular and cardiovascular events in addition to chronic renal failure are definite risk factors of hypertension. Many of us self insure. I have for decades. Medical costs are low in Thailand and the care can be excellent. So don’t worry
A $1000 campaign fund donation to your congressman followed by a discussion with the congressman’s aide regarding your situation might be helpful in obtaining a visa for your friend. That was the acceptable donation at the turn of the century.