Hey Moogroc,

1. How tall/heavy are you?
2. What do you need for the bike to do? Just get you places in under 10 mi rides? Race?
3. Where are nearby ports?

Personally, I think any folding bike (Dahon or smaller, 20" or smaller) should work fine for you.

Buy a used one (if you're near ports, you can reach out ahead of time or look for used bike stores).
Use it.
Sell it at minimal loss.

Having had a Xootr Swift (rides really well, folds not great) and a Brompton (folds really well, rides decent), I'd say that it really depends on your needs.
If you can swing the space, any Dahon should work (except the non-folding ones).