The Montagues have NO stated weight limit, as do most Dahons. And if you look you can find a paratrooper for $629, and the others for correspondingly less. Montague makes their folders so no structural members are cut/compromised, and the load carrying ability of the bike has to be seen to be believed, with that huge top bar (about 6 inched in depth). You'll have to buy new tires, if you want to use them as road bikes. And at 32 pounds for the larger frame size, they are not particularly transportable.
The Dahon Jack, Espresso, Matrix are all full sized folding bikes, but most dealers put a 210 pounds wt. limit on them, though I do not recall seeing that limit on Dahon's website. The Jack has Schwalbe Big Apple tires, from the factory.