+1 for using a pallet jack.
Stable and more capacity than you're ever likely to need (4,500-5,500#) and you only need to buy one for all of your machines. As an example, I have a 3,200# Crescent P24 planer that I move with my pallet jack. When in actual use, the P24 lives on 6x6" timbers. When moved to a different location in the garage, I level it by using wooden shims - simple to do as you can easily lift and lower even a machine as heavy as the P24. Overall, the jack makes moving machinery easy (not that moving a 3,200# machine is easy), and it's very stable, and cost effective. Each subsequent machine to be mobilized only requires some 4x4 or 6x6 timbering and some lag screws.
A standard pallet jack measures just under 27" across the width of the two forks. This would probably be too big for a typical cabinet style table saw, but there are narrow jacks that are just 15" across the forks. Those are a little harder to find used, but I do see them from time to time on CraigsList.