I'm trying to decide on which folder to buy, and I dont have $1000 to drop on a Brompton.

One of the nicest things about the brompton is that after you fold it, you can pull it behind you like a suitcase. How sensible is that? Especially for commuters!
It even comes with a neat cover that you can put over it and makes it look like a normal suitcase!

As far as I can tell, none of the other folders allow for this. Is that right?

Can you pull a dahon behind you easily? Like a cart or suitcase? Or any other major folder brand?