First off, if you do decide to sell it definitely talk to Kevin @RedRockMotors , he's an excellent resource on what's selling and where.
What's your other car, that the wife's Lexus has to live in the driveway? I would suggest that what she is unhappy about isn't that her Lexus is in the driveway, it's that your house has two garage spots and you're using both of them. If you daily a Bentley then it makes sense for her car to be in the driveway, but then at that point I expect you could afford a house with a 3-car garage.
Unless you're trying to find "car storage", any storage unit that your FJ will fit in will do. What's your ZIP code? That will help get an idea of cost. But at that point, you'll never drive it so what's the point of owning it?
Simple question: if you aren't driving / offroading the FJ, why do you have it? If you just like having it that's fine. Odds are that the FJ will increase in value faster than whatever your cost to store it is.
My advice, as the guy who wrote the buy/sell guide: use it or sell it. There are outdoor car covers that you can put on your other car or the FJ, if you don't want to store it somewhere else. Or, buy a house with a 3-car garage. Wife and I just signed on a house just for the bigger garage, so I can sympathize.
Good luck!
