I'll tell you what....the Big Squeegee is cost effective enough that if you don't have one you should definately order one and try it out, then you can answer your own questions. In a pinch you can laminate small pieces of material but you could never laminate more than you can place on a table at one time. In other words there is no chance of laminating a roll of material. Why? Because like has been said you can't get enough or even enough pressure to do the job properly. You almost always will get some imperfection in the laminate application, whether it is silvering, bubbles, streaks, cloudy application, etc. Plain and simple, if you need to laminate, you need a laminator.
Now the Big Squeege is excellent for applying digital prints to substrates, I can't even imagine what I would do if I didn't have one for that purpose.