Finish kit and avionics stuff seems like a big question mark. Avionics is generally not worth much after a few years, and a big part of the finish kit is the canopy, gear & engine mount. Gear and engine mount are definitely trashed on this one, and the canopy might or might not fit without an overhaul of the skirts.
Anything that's even a little bit custom fit is like remodeling a house vs. building new. You spend 1/2 your time trying to adjust or accommodate or make fit to something that's already there.
If I ever build another RV, I'm going to look for a wrecked one, not for the avionics or airframe, but for all the other nickel and dime stuff. Lights, switches, breakers, seat belts, antennas, stick grips... all that stuff really adds up.