I have a Hinterberg Easy Build Plus floor frame that I built all by myself (piece of cake!). It folds flat up against the wall and I made it so I can change the width from 4' to 6' to 10' by changing the poles. It's a three rail, requires no basting of the sandwich, and I like it a lot. It was well worth the price.
http://www.hinterberg.com/prod-Easy_...ame_Kit-8.aspx