I plan on keeping it until I get bored most likely.
The thing with being in the military is that I make more money than I know what to do with and I am about to get more in a few months when I hit my 4-year mark.
Look into rental property.
I used to work with a guy from Fiji who landed in the U.S. with just $3000 to his name. He got a job, rented a room, and took what was left and bought a small "share" in a plain-vanilla 8-plex apartment. You've seen the kind: a nondescript, two-story box with for apartments upstairs, and four down.
The guy worked whatever jobs he could get for whatever wage he could negotiate, and lived like a Buddhist monk, but was gradually able to buy into greater and greater shares of the apartment. At some point, he moved into one of his units, while continuing to draw rent from the others he held stake in.
At the time I met him, he'd been in-country for five years, and had just bought a regular house, which he had moved into, and was working on with the intent to "flip" it within a year or less. He held stake in most of the apartment building in which he originally invested. It's a "budget" apartment building, which means he gets some seedy tenants, but mostly things go well, and he's continually building,and building his assets.
The guy was single, at the time, had no family to look out for, and only his own mouth to feed, so he could afford a fairly stiff risk profile. And, he didn't have a big career feeding his bank account; he was working jobs that paid only about $10 to $15 an hour.
It's just all about how patient you can be, and what you're willing to accept in terms of risk. For him -- even if there were a catastrophe and he last the whole apartment building -- he had a job to keep him fed, and could always go rent a room somewhere and begin again.
Ah, boredom - the problem of youth... ;-)
Just for something to stick in the back of your head for future reference - my Jetta TDI has 470k on it... ;-)
Which is probably the big reason I recommend one.