I would pass on option 4. My 14 and 16 Ram Limited was bought back by FCA. You would be trading 1 problem for another. Ram's drive line is defective. Even in the 19's the tranny clunks. MY 14 was so bad I had 2 full file folders full of repairs. My 16 had the tranny replaced, driveshaft and t-case. Both with under 15K miles. Absolute Junk. In my experience there are only 3 options if you need a truck, Toyota, Ford or none. I picked Ford for the drive line. It's still expensive junk, but it's the best junk available unless you want old tech Tundra.
If you choose option 1 and live in state with lemon laws similar to Texas, you don't need a lawyer. The state was very helpful in getting both my trucks bought back. I didn't even have to go to court because they knew I would win and they settled. Also, in Texas all you need is 3 repairs (get them in writing even if they say no) for the same problem before you file a claim. And a little birder who works for the company the actually buys back vehicles from manufacturers and picks them up from the dealer told me when you file a claim, mention SAFETY as reason for filing your claim.
Hope you get your truck fixed.