Is this a viable overland vehicle concept?

[pawperso]

I'm trying to layout plans for modifications to a Toyota Hilux twin-cab for use as an overland 4x4 and mobile support vehicle for extended kayak and biking trips.

I'm in a wheelchair so normal off-the-shelf solutions don't work too well for me. I don't need any adaptions to the driving part of the vehicle, apart from simple hand-controls fitted. I just need to make the rear of the vehicle and it's contents as accessible as possible from a wheelchair.

The main problem is not being able to reach anything, normal pick up sides are too high to reach over and grab stuff, when folded down the tailgate just adds another foot between me and gear. I'd like to be able to grab things without having to unload the entire vehicle just to grab something at the back.

I'd really like to have the rear bed stripped down to the chasis and built back up as a box-body that has full height top-hinged doors on 3 sides of the rear bed and a pull-out drawer system at the rear.

I'm keeping the rear seats in the vehicle for passengers as I want to be able to take other newly injured chair users along on a few adventures to re-introduce them to the outdoors. But for the times I'll be by myself I'd like to be able to have the security of sleeping in the vehicle and use a pop-up roof to give me a bit more room. Whch I'll access from inside of the vehicle via the access hatch in the back. I'd like the sleeping shelf to be removeable when it's not going to be needed.

Doubt any of that's made any sense at all, a picture paints a..........


Not quite exploded view, but with pretty much all the doors open and slide out drawer extended.











Not much good at 3D software so didn't bother with stuff like the wheels, or much detail. I plan to have my head at the very back of the vehcile and legs poking out the access hatch, supported by a little extenstion on the platform I found to fiddly to add in these basic mock-ups.

I have no experience in engineering or mechanics so don't know how rigid and stable something like this would be, it's basically a metal framed cube with plastic sides. Doesn't sound too stable to me! :confused1:

Any thoughts on whether this could be a viable build, structurally, are most welcome.