Question about Keen cut Excalibur 5000 board cutter

[boscawen46]

Hi ,
I am looking to buy a Keen cut Excalibur 5000 board cutting machine.
I will only be using it for cutting grey 1.5 mm backing board sheets. A few questions please :

Can the horizontal support bar be moved to a higher position ? If not could something be put onto this to in effect make the support area higher ?

How many of the aforementioned boards together would it comfortably cut in one go and not to over do it with the machine ?.
Once assemble is the whole machine heavy? Could it be carried by two people ?
Thanks in advance
James