If I were in your situation, I would look for a used Brompton locally. If you love it, you can look into bringing it back with you. If not, you'll probably be able to sell it for near what you paid for it. It's like a free bike rental. I've done this a number of times, with lots of things (not just bikes) and it works well if you don't mind the hassle of buying / selling. Just a thought.