the van.
looking at a cheap LDV Maxus. maybe an old royal mail van, you get a lot of van for the money.
strip it out, paint in in red oxide. http://www.decoratingdirect.co.uk/viewprod/t/TORQDRO/
other parts matt black http://www.decoratingdirect.co.uk/viewprod/t/TORADHER/
basic outside ideas on Pinterest https://www.pinterest.co.uk/johnheadstrong/overlander/
the overlander style done with Matt paint and large tyres
get great tires!! https://www.tyremen.co.uk/blog/do-i-need-specialist-camping-tyres-my-motorhome
inside
something like Monitor-Car-Rear-View-Kit-for-Bus-Truck-UK
solar https://www.bimblesolar.com/offgrid/12v?sort=p.price&order=ASC