I have the yard or store where I buy the plywood cut the sheet to rough dimensiona to let it fit in my vehicles. (Most BORGs and yards have a panel saw.)
I used to do that also - - but - - the lots where I buy my good plywood - not the junk the borg sells - don't have any saws to cut down the sheets.
I tried to come up with some way to use my Festool saw, but, it was too expensive to buy a decent generator - plus those are too bulky & take up too much room in the compact & sub compact SUV.
When Home Depot had a great deal on the cordless Makita a couple/three years ago - I jumped all over it.
Made the change from DeWalt to Makita cordless tools also.
My granddad always said, :As one door closes, another opens".
Wonderful man, terrible cabinet maker...