Sorry, but you are looking at this wrong.
1. Based on your posts, you are between 60 and 64.11 months, retired and cash flow isn't your problem
2. You don't need insurance for your doctor visits. You have the cash flow to maintain that relationship.
3. You don't need insurance for your prescriptions. You have the cash flow to pay at the pharmacy. (Use goodrx to get the best deal)
4. US Health has pre-ex questions, so I am not even sure how you would get it, but if you are Type 2 on Metformin, I would assume you can afford the $20/month
5. Do the math. Figure out the the cost of the cheapest HSA
plan, add the doc and prescription costs. Compare THAT number.
You need insurance so that you are not financially wiped out with a catastrophic event or diagnosis. Get the least expensive HSA
eligible plan, on the exchange, so you aren't wiped out if the doc says "its cancer". You may not like the doc list, but so what? Pay cash. What's important is the hospital list.