I too would pass on a project camper, unless you have experience with campers. Being handy, yes, a good thing, but campers need a bit more than handy to repair this kind of damage.
And, you don't know what else needs fixing too -- eighteen years old ??
Price too high for this condition ... If you were knowledgeable about campers, and could evaluate other aspects of it, and repairs -- maybe $1000 ... then, you're just buying the shell and components, and will probably put another $2000 at least, especially if the Fridge, range, and pumps and electrical systems need work too.
For $3000-$3500 you can get a better camper, and no headaches.
One more piece of advice ... while you're looking. Water damage, water damage, and water damage. That's the most important factor in campers ... look very carefully on any camper that no water has penetrated the walls and roof ... it will destroy the interior of the walls and is extremely difficult to see or repair. Water will travel from a leak to 'anywhere' inside ... and water has NO mercy.
Monkey44
Cape Cod Ma & Central Fla
Chevy 2500HD 4x4 DC-SB
2008 Lance 845
Back-country camping fanatic