In Summer of 1999 I found a 1982 GL1100A in cherry condition with 18K, had to have it.
Ended up replacing rear wheel because it was bent, you could see evidence of something being wedged between rim and swingarm and operantly doing the damage.
I had wibrations at 70MPH that would not go away untill the wheel was replaced.
I had new fork seals installed and brakes rebuild by a local guru at a time after my rear brake seased on me mile after getting on the freeway.
Warn pads caused piston to get stuck, friction build up heath and subsequently locked the wheel.
I was able to counteract the wheel lockup untill I pulled over by winding up a throttle and acting quickly.
I had mooving and shipping expences that factored in at a time, I spent about $1000 in varies parts and small upgrades and recovery efforts.
My wife estimated at a time that my total cost of owning that beauty added up to nearly $6000 for the 3 years, I sold it for $3000 in Fall of 2003, that makes my cost of ownership about $3000, never cried over it since I have enjoyed every minute of anything I did with that bike.
Here I am few years later with 1984 GL1200A and 19.5 K on it's clock, bought it for $3600 and my cost of recovery / upgrades and customising to my taste will add up to $5500 with purchase of new Corbin seat.
I am a kid again, haven't played this hard in years and have no regreats, theese are beautiful bikes and bringing one back to life is thing of the choice not economics.
I could have nearly new Kawasaki Concours for the money I am spending here, very nice sport touring machine with strong aftermarket support and a cult of followers, but I love the early wing instead, there is something about the bike that you don't find in another brand or type.
It is up to you, bike has to have basic solid value to qualify for restoration in my mind, but most of all, you must love it, .............. otherwise go for economics and part out to recover some of the cash and try another one.
First one was a learning experiance for me so everything I do now is more to my advatage and I am ending up with better bike.
Keeping any 20 plus years old bike on the road costs money, heck ,some people spend this much to keep their new bikes on the road