Oh man, airplanes. I love me some airplanes. I was Executive Director of a Jet Airplane Museum Association at one point (translated to Funding Manager).
We had a small fleet of CF-100s which were under restoration, with two or three flyable while I was there. I was also tasked with figuring out funding for getting a de Havilland Vampire. Jesus, what a hideous, beautiful plane. We were in talks to trade our non-restored CF-100s for 4 F-86s from a German museum, but I left before we could figure out the goddamn shipping issues.
It boggled my mind that you could get 1st and 2nd generation jet fighters for basically the cost of a good sportscar. It's the restoration costs that kill you. If you just want a fancy lawn ornament, you could get F-86s for like $70-$90k since there are literally fields of the damn things, but to get them air-worthy and flight-certified would cost you between another $150-$250k depending on your mechanical capabilities. We traded so much in terms of parts and relied on a lot of volunteer labour from retired RCAF personnel. Hell, one skydiving enthusiast got us a full set of ejector-seat parachutes some bloody how.
For a while there was a deH Vampire at near-restored for like $120,000 that was a constant, physical struggle to avoid bidding on, personally and professionally. The lack of/need to restore existing electronics killed it though. The tail end of 2nd-gen and 3rd gen fighters are out of most private owners reach for the same reason: the more electronics and hydraulics you need to maintain, the more your costs skyrocket. At that point you're better off just buying a new BAE T-1 Hawk. The costs over its lifetime will be less, even if you're shelling out $25m out the gate.
If I ever make it big, I am probably going to get an F-86 or Gloster Meteor and get it restored on a lend agreement.