Sorry to hear about your uncle, cancer is a ruthless bitch.
As for MGP...that rig in picture is a tank...full skid plates a the way back. Rock sliders, warm 12k mounted in that heavy C4 bumper, suspension/spring mods, rtt, full enclosed all aluminum bed rack with 70qt fridge/freezer and 200Ah solar battery set up, 20 gal pressureized water tank...
its close to 8k lbs before loading gear. We averaged just under 12mpg round trip over 3400 miles to wyomong and back. Over 9k lbs coming home with our elk in the coolers.
My wife's 2018 would average 16mpg overall, 18.5 on highway with stock 18s before adding 20" wheels with heavy load range 33x12.50's.
she's about 13.5 average and 16.5 highway now, but hers hardly ever sees highway use anymore which shows in the lower average.
Mileage doesn't really factor in for me...dont drive enough overall that a couple mpg would ever sway my decision...If I drove 30k+ a year and swapped for a new truck every 100k, I might consider something else