So much of the gas/diesel question hinges on your usage pattern. Lots of miles, mountains, weight, majority with TC on-board favors diesel. Occasional use, truck stays parked except for once a year trip gas may be a better option. The issue with diesels is they are never cheap to fix. AND as they age stuff gets tired. A set of injectors are $1000 just in parts. A new trans =$3000++. New engine $12,000 or $5000 for a rebuild. Gasser parts are just cheaper. UNLESS...(back to my initial point). OK, I can buy a rig like my 2002 F250 4X4, CC diesel for 10K with 170,000 miles and have the trans drop out the bottom 10 miles down the road. Bingo $17K truck. The 4R100 Ford trans is decent but once overheated (the OEM gauge only indicates you just bought a trans)they are toast and a prime time to dump them so the new owner "discovers" the problem.
Wish I had dually for the TC but the other 340 days a year I don't need to be wearing out 2 more tires. You mention blowouts but you don't have duals on the front so you never really have full redundancy.
Read a lot of forums. Avoid the Ford 6.0 as a used truck. You can bullet proof them for $3-4,000 but then you are back to a newer truck or different maker.
(IMO) Dodge has the best engine with the Cummins. GM has the best Trans with Allison and Ford has the best chassis and interior. If I could build that combo I would be in heaven but then I'm spending $30K.