Join Date: Oct 2003
Location: Newport Beach, CA
Personally, I think you are continuing your string of "youthful mistakes", but here's my $.02:
With your upside-down situation on the other two cars, you're not in a great financial position to do what you want. I would slow down and privately sell one of your current cars ASAP, getting out from under the depreciation and insurance costs. Continue saving (for a year or more?) while looking for a good deal on a used Elise. There are some great deals from time to time in the For Sale section here. They aren't necessarily the cheapest ones offered, but the best value. For financing check out your options at USAA and not just for car loans, but any kind of loan.
And thanks for your service. It is very much appreciated. Godspeed.