Hope the surgery went well.
I did what you are doing two years ago. It took forever because of COVID but I finally acquired a chassis cab F-550.
Then I took it to Valparaiso, IN and had Classy Chassis put a box on.
One of the best aftermarket decisions I made (in addition to the Keldermann air ride) was getting the high capacity Trailer Saver hitch.
My 2012 Majestic is a 37 footer with a total loaded weight of 21,000 pounds. But the kingpin weight is bonkers at 5,500lbs. Again, the Keldermann auto-leveling air ride is fantastic.
Hitched up and ready to go we're 60 feet long.
We're fulltimers and in the last two years with this truck/trailer combination we have crossed the country east to west and Padre Island, TX to Flaming Gorge, UT. We've seen hot and we've seen cold. There have been endless stretches desolate highways and white knuckle mountain passes. The F-550 has performed stellar. I had a 2006 F-550 that was just the opposite. It spent more time on the rack with the cab off doing major repairs than it did on the road. You should do well with the route you are going.
Edit: I had attached several pictures of my rig but the post stripped them off when I published. Don't know what that's about.