green horn. . .

You can't sit here and say "oh, those are terrible ideas, mine wouldn't weight that much!"

and then go on about "oh, I'll make it 'bombproof' with 48 spoke wheels and a huge ass frame and these big frickin hard shell cases"

The fact is a trailer would suit your needs better, be lighter, be cheaper, and be able to break down so you could get it somewhere as opposed to a monster bike.

A trailer WILL be lighter than making a larger frame

A frame MUST be rigid enough to support you, that includes anything behind you. As the bike gets bigger, rigidity becomes an issue, the bike has to be built beefier as a result and overall the bike will weigh more than the trailer addition to a bike.

The idea of 48 spoke wheels with solder is the insane idea. Overkill at its worst. You would be the guy who drives his Chevy 3500 crew cab 30 miles to his office job every day. Spinning weight is much worse than dead weight.

Why are you worried about weight when you want to carry 20 lbs of water?

There is a reason nobody has come up with exactly what you're looking for.

Not discouraging you from asking questions, but you want a total redesign of something that has lasted more than a few decades largely unchanged in overall design. A lot of alternatives have been proposed, some have been good. Most have flopped. Either way I'll stick with my 'traditional' (whatever the heck that means) touring rig.