100 miles, stored and very dusty. WORTH TROUBLE?

[Crazy project?]

Hi. Sadly, older couple bought new wanderlodge and only 100 miles on it. Dealer drove to storage for them and then couple unable to travel. Plastic protectors still on furnishing. Time warp of early 1990's.

I know the tires must be replaced, light reflectors clouded (little things) My real fear are the problems caused by sitting up so long...fluids left in hoses, refrigeration, lubes, gas, anything rubber.

Any of you have a $ thought on what is might cost me to get it up and running and not break apart while traveling.

Thank you!