@JOAT,
I too am no longer able to handle full 4 X 8 sheets of 3/4 and 1" material.
Some years ago I built myself a "cutting table" so I can break down full sheet stock outside my shop.This table has proven to be a huge improvement over saw horses, and I now take it with me whenever doing work for others.When not in use, with the legs folded, it just lays on edge against the sheet stock in my shop.
It's just a 1 X 4" pine frame about 30" X 70" (not critical dimensions) with 5 short 2 X 4 cross pieces, laid flat and flush with the top edge of the frame. One of these is attached across the center of the frame and then two more are placed near each end, spaced so that a set of Banquet Table legs can be attached using short wood screws. There is no metal at all in the top 1" of the table. When folded, these legs fit up inside the frame. All of the joints in this frame are glued together with #20 biscuits, so no metal is near the top surface.
On one side of the table frame I attached two small squares of plywood with an off center bolt so that I can rotate them to extend above the table surface or rotate them to be down below the table surface. When I want to load a full sheet I turn these to their up position and then lay the table on it's side with these down against the ground, Then place a full sheet on edge on these pieces of plywood with the sheet laying against the table top. I then lift the sheet and the table together, rotating both until the table is upright on it's legs with the sheet laying flat on top of the table. I then rotate these two plywood squares until they are below the table surface and center or position the sheet on the table for the first cut. When the cut is completed, none of the pieces fall. They remain on the table until I remove the off cut and then re-position the remaining piece for the next cut.
I make all of my cuts using straight edges and a circular saw with a thin kerf high tooth count blade. The saw also has a guide attached that follows the straight edge guide clamp, kind of like a track saw. I've made and attached a "Lexan shoe" to this saw which has a hole cut in it for the blade guard to freely operate, but with a narrow blade slot where the front of the blade rises up through the wood, making it function like a zero clearance insert.
I always set the saw depth to cut about 1/4" below the sheet being cut. If I ever put enough kerfs in the cutting table for it to be too rough or weak, I'll save the legs and just make another cutting table. I usually cut the pieces about 1/4" oversize and then trim them to final size inside my my shop on my Unisaw.
Last week I built myself a 2 wheeled dolly out of axles and wheels from a discarded lawnmower a few scraps of 3/4 birch plywood and a piece of 1/4" plywood. Assembled, it has a 1" slot in the top of it, with a lawnmower wheel on each side. I can lift just one end of a piece of sheet stock and slide this dolly under it. If I want to, I can kick this dolly farther until it is about centered under the sheet, or just leave it near the end. Then all I have to do is pick up the opposite end, or if the dolly is in the middle, just kind of balance the sheet as I roll it to where I want it. The lawnmower had two large wheels on the back, so I saved them too. I haven't yet decided if I like the large or the small wheels, but I can change them easily. The large ones let it ride over rougher ground much easier, but the small wheels don't require the sheet to be lifted as high. So far this sheet carrier is making a significant difference and I've been using the small wheels.
I also ordered, and just received, a "Gorilla Gripper" from Amazon. I played with it in the shop today, and it seems to do what it's supposed to, but I haven't actually tried to carry any full sheets with it yet, only a couple of partial sheets have been carried around the inside of the shop so far. The beauty of the design is that you lift and carry the sheet from shoulder level using this and it doesn't require bending over to grab the bottom edge of the sheet at all. Even 5 X 5' Baltic Birch seems to be easy to move with it. The only bending needed is if you have to attach it to a sheet that is lying down. With my metal knees, bending or squatting down and lifting heavy weights is almost impossible for me now. Hopefully, these two additions will help me continue moving full sheet stock by myself.
I got a kick out of the Gorilla Gripper commercial too.
https://www.youtube.com/watch?v=CRmCpP9tiek Fortunately, this didn't happen to me when I tried the Gorilla Gripper out.
Charley