This is the pic from the auction site.
There is a shaper mobile base under it. Bill will have to raise the saw to get that mobile base out, then reinstall the lower trim onto the cabinet's bottom edge, then slip the saw's proper mobile base under. Tilting the sa w, to shim it may be difficult for Bill, alone, because, in part, there are no legs under the side table. He has already stated the saw tilted toward the unsupported side table end (there are no legs under the side table, at the moment) and he was concerned about it over-tilting (uncontroled), that way.
An engine hoist would definitely help. Weigh that rental cost against his making a frame support, to shim/elevate the saw. He can't shim at the bott om and do all the base work, the shims will be in his way. IMO, the saw ha s to be shimmed and/or supported at the tabletop, for the bottom to be open /free, for the installation of trim and proper mobile base.
With a custom support frame, a crow bar would work, but I'd likely use a 2X or something softer than a metal bar, to prevent scratching the saw. With a crow bar: Maybe clamp a 1X under each side of the tabletop and lever aga inst the 1X wood.
My suggestions are for Bill working alone. With some assistance, his tasks would be easier, plus he would have someone else to blame if something got screwed up.
It's too cold to do any woodwork, now, so he has plenty of time to plan, li ft the saw safely, etc., etc., so the more suggestions from everyone, the b etter for him to develope the best plan of action.
Sonny