Welcome John Totten! Two sheets of plywood are a big help for moving heavy items over gravel and grass. If you have a slope or hill it gets tricky. I...
You could get a used Unisaw or something like that at auction. I see them go for $300 or less quite often, also in the woodworkers club classifieds....
Your floor is too flexible. Bolting it to that floor won't help. You have to get back to the concrete for bolting to work. A round blank doesn't mean...