With that kind of damage, I would take the insurance $$$ and not look back.
I had a 5th wheel that was totaled by hail damage (tin siding) so it didn't require much repair to be completely usable. I took the insurance money, then bought it back from the insurance company with a salvage title. Then I sold it to a family member to use as security guard housing on private land. Had more than enough to buy a new replacement for myself.
But the damage on yours sounds too severe to be economically feasible to fix, even for a salvage title. Unless you just like fixing things yourself.
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder