Depends on where in the country you are. RAM Hospital in Chiang Mai and Kasemrad in Chiang Rai are places you can go to with new, up-to-date equipment and knowledgeable staff.
I always use Orbitz, book a flight and cancel within 24 hours with full refund guaranteed. That way I always have a ticket at hand. Of course you have to make sure your flight does not take the full 24 hours....
The Thailand Pass is easy to get, even with your own health insurance, if that insurance also covers COVID. So, before getting an extra policy, ask for a coverage letter from your current assurance! Save money, don't fall for the money -scheme. Approval takes up to a few hours nowadays.
Go to the market in the early morning and point out which part of the pig you want to have cut out -> prepare and cook, boil, roast or smoke it yourself. Remember to age it for 2-3 days, use those days to marinate/spice the piece.