There is a slight issue or two with this saw. Is this sold in the states? Doubtful as of yet and possibly quite expensive. Also, if a person is in a wheel chair, I think someone, such as an engineer has overlooked the fact that, this will interfere with setting this up. Especially if you are intending to rip in half. Standing and reaching to get to the 2' mark is one thing, try it sitting down. I'm not saying this is a bad saw or idea, just the purpose for which the possibility of use, ie., someone in a wheelchair, is NOT good.
Even the "all-in-one-clamps" and as the one tommyt suggested, IMHO, aren't really the best solution to the OP. These are quite easily damaged and very difficult at best to "fix" that damage. I have a Bora clamp, all aluminum, too fragile IMHO, for it's design... is the same as any other straight edge clamp, flimsy.
Having a yard cut the pieces for you IS the best option but, as Bill has stated, be very watchful and careful of how they cut it for you. You tell them one thing, they'll do quite the opposite of what you asked.