I was wasting time on Barnstormers, and came across an ad for a "low time" Twin Commanche. The ad isn't very specific and doesn't have any pictures, but says the plane hasn't been annualled in 20 years and has always been hangared. It got me thinking about the practicality of picking something up like this in the future to get my multi and build time in.
So my question is, how much of a project is this likely to be, assuming it hasn't been used for parts for the last 20 years? Obviously the engines would need to be checked for corrosion, pitting, etc., and hopefully it wasn't used as a rodent hotel, but would there be any systems, like the retracts/hydraulics, that would need to be overhauled simply due to age, or would hydraulic hoses and such hold up OK?
I'm not looking to purchase anything in the near future, just trying to build a knowledge base for the future.

