Something I found that is amazing!

That is a rig I would not want. I would guess it is really heavy, probably heavier than my 9.5' Northstar Igloo. I have solar panels, 300 AH of AGM batteries, 40# propane and 35 gallons of water. He has a few gallons of water, no sink, no shower. Even just for drinking and cooking he is going to need water every couple of days.

He didn’t say whether it could be dismounted?

Not a bad build, I wouldn't mount the roll of paper towels right over the gas stove, that's an accident waiting to happen. It's probably pretty heavy for what it is...but I guess up there in AK he doesn't have access to cheap RV parts to build it lighter, so again, it's not bad!