After many weekend hard work (DIY) the refurbishment is complete! Thank you to everyone for your advice.
We striped out the old canvas and replaced with one from canvasreplacements.com.
New tires and wheel bearings
Extra amber and red reflectors and extra set of LED brake/indicator/running lights at rear
Removed a few 10's of dead mice and a few thousand mice droppings.
Stripped off old wood veneer, used exterior paint and made more modern. Fresh paint everywhere inside.
Replaced the rusted out brass fasteners with SS or zinc dipped screws.
replaced interior lights with LED (lower current) and added LED strip light above range.
(will replace all exterior lights with LED bulbs later in year)
Propane lines tested (good)
Main Lift eye bolts replaced and one of the pullys replaced with steel one
New stick on laminate covers for work tops and tables
All plastic/ metal trim / handles removed and resprayed, including support bars
100W solar system and 4x 7Ah battery storage with charge controller and DCAC inverter
roof cleaned of algae, filled/ sealed and painted with exterior paint (sides to do next spring)
made a new trailer electrical cable to the SUV
Soaked / Cleaned out the old foam bed and seat bases. Made new covers for everything.
Put in deep-pile stain-resistant carpet (removable and washable)
(Sway bar goes in this week)