A friend of mine bought a used set of “max jacks” (mid rise lift.)
He has an attached garage with a standard height ceiling, but the floor was questionable with just barely a 4” slab. He ended up cutting out a 4x10 section to mount the hoist posts. He poured it about 8” deep with crossed rebar and pinned with rebar to the existing slab. The max jacks are two independent posts with no adjoining cross beam, so a good concrete base is a must in my opinion. They work nice.
They are also designed to be “movable”. They are mounted with female thread inserts in the floor, and have hydraulic quick couplers, so if needed, the can be moved for open floor space without a whole bunch of effort.