I priced out a 60" base cabinet for the cooking area.
Not happening! Besides the particle board construction wouldn't hold up to road vibes for long.
I picked up a $60, used buffet and hutch. Solid wood. The lower buffet section has central drawers, not doors so we can stow cookware easily. I'll build some kind of pin to link the drawers together and hold them closed during travel.
The end sections will house fresh water jugs and a grey water receiver.
I pulled a two burner cooktop and a sink from a 1982 Sportsmobile.
Cleaned them up. Wire wheel and spray paint for the cooktop. Photo shows a test fit. I'll put a faucet and a laminate countertop with an integral back splash once the world returns to normal. The left end upper drawer is now pinned in place. The right end one is cut down to half height. The center upper drawer lost 3 inches in width. The whole cabinet is set on block legs to prop it up to an acceptable counter height. The legs allow storage beneath for our dining shelter.