[Tilikum Turbo]

I once read that the cheapest aspect of buying a used Porsche may be the price...and then things can get extremely expensive from there.

Since we all are Porsche owners, we form an emotional attachment to our baby, since it's a car that is a joy to drive, and it's very unique.

Since you are looking at this as an investment(and you do NOT want a negative return for your money and work), like buying stocks, forming an emotional attachment to that investment can be very dangerous.
Example is people who like IPODS, and invest in Apple who bought the stock at $700/share, and now have to sell at $450...so now with $10,000 invested, the return today is $6428, at a loss of $3572

So let's say you get this 68 911T for $5000...and then you spend(and remember, your time is also money...you never ever get back time) another $10,000 to $15,000 to get in a presentable condition(paint, engine, body work, etc..etc...this all gets very expensive very quickly)...and now you have a car that, what will the fair market price be? Will you actually MAKE something appreciable after everything is said and done, or break even(or worse, lose money).

Best bet may be(for investment purposes) is simply strip the car down to every part that is resellable in a servicable condition, and you'll likely make 3-4 times the original investment. Rebuilding the car in an "as-is" condition, and I would guess, your rate of return will not be close to that.

Good luck!