Hey Brian,
Do you have space for a triangled cart? I know it may seem a bit
cumbersome to have to wheel it out of the way when necessary but it
keeps your sheet goods closer to the ground so you won't be straining
to fight gravity when you are filling or emptying your storage rack.
Everything you need- sheet good wise - is right there to see, plus you
could roll the stock up to your table saw or work bench for easier
placement.

Marc