I'm not sure I like that set up or not. Like Aman said, snapping a fake boot in and out is a pain. However, in this set up, the fake boot is fastened to the bench so you press the ski into it. In my head, this looks like it would be easier than pressing the block of wood into the ski binding. Same with taking it out.
I would also use two clamps other wise it will eventually spin a little and you don't want that when you are sharpening or scraping.
Like sibhusky brought up, how do you do edge work? You can do it when the skis are upside down like that but it should be avoided. It isn't a good position and makes it hard to see what you're doing.
I think the end pieces folding, why convenient, is asking for an accident to happen. Especially from the one at the tip. It is set to fold in the direction you are going to be scraping or brushing. Maybe just put the hinge on the other side. That or screw the hinge and make it "fixed".
My first vice was home made out of 2x8s. If you stick with it, you'll eventually graduate as far as your better half will tolerate.