You should fire your financial advisor. That's the worst advice I've ever heard.
No car is an "investment". They're all a loss. As I stated previously, the only way you're going to retain any higher than normal value on a car is if it’s in both immaculate condition and the mileage is very low. The only way to do that is to put it away and not drive it....but what's the sense in buying it then? To have the "nastiest", most expensive garage queen on the block.
As also stated earlier. Basic bolt ons like exhaust, intake, gears, wheels/tires, shifter, etc, etc don't affect your warranty. So tinkering is in. You only risk harming your warranty with power adders, engine work or electronic enhancements.
You don't "buy" simply because it's new technology for a company (whatever that means), you buy it because you want another sports car and the ’11 GT is great value for the money. As far as the lastest crop of sports cars go, the Mustang GT (and now even the V6) remains your best bang for the buck.
Also, you're assuming these late model Shelby’s are going to jump in value. If you think you're ever going to get more out of a GT 500 that you paid for it new, you're sorely mistaken. I don't care if the bury Carrol Shelby himself in it when he dies. They aren't limited production vehicles like they used to be (Carrol Shelby would put his name on a toaster if someone paid him enough) and they aren't the first of their line. Cars don't pull in the big money like they did before 1970 anymore. You've have to have something pretty special in order to see any real increase in value. Besides...is it really worth it for your average a person, on a limited income to buy a car, not drive it/store it for 20-30 years just to turn around and mayyyybe best case scenario make a few thousand dollars profit? What do you think it's costing you in insurance, storage, upkeep over that 30-year period. Do you really think you're going to make any of that back? That's a hobby best reserved for the serious collector out for the love of the hobby. Not for a guy hoping to double his money. You want to see growth over a lont period of time, put your money in an RRSP.....not into a car.
Nope...never going to see anywhere close to his money back. But he's getting a great daily driver that performance at a world class sports car level that'll provide years of fun.
Again, you're waaaaayyy off base thinking buying a car is an good investment. And don't take this the wrong way, but your "guarantee" isn’t worth the paper it’s written on. You can't possibly enforce such a statement, so why make it? Do you honestly think people get the kind of money for these vehicles that we're seeing on Barrett Jackson.
Also, don't think because an engine was hand assembled by a couple of guys that it's going to skyrocket its value. '96-'98 Cobra's can be had for as little as $5,000 in many places right now. A couple of signatures on their valve covers didn't help retain their value any.
Man, you're really stuck on this "cars are an investment" think, aren't you? Explain to me how we've got from the O/P looking to upgrade his daily driver, to buying a car to mothball for 30-years hoping to make his money back on it, again? Once more…going into debt for “any” vehicle with hopes of getting a return on your money isn’t a smart idea. The only return you’re going to get when buying a vehicle is the enjoyment you obtain from driving it. There’s no monetary gain to be had.
You don't by chance own any swamp land in Florida, do you?