These lifts are actually dual purpose:  parking and fixing.  They are 4
post, and come w/ optional pans to catch drips, etc.
They come in 2 lit heights, as well.
I had researched this a little, got some info. The American-made company
charges between $1800 and $2600 for their various versions, and the whole
unit is heavy, almost 2,000 lbs., iirc.  Very stable, they claim, will not
tip.
W/ a little welding, could put casters on this to make it portable--w/
admittedly some heaving/ho'ing.

I was going to put one in my driveway, either a 2 or 4 post, but the
driveway is angled and curved, just wouldna worked out super-great.
If the OP is interested, email me for links. For his purposes, I think these
would be great.

Altho the 4 post of course lifts the car by the wheels, they also make a
jack adapter of sorts, where you can now lift the car off the ramp, so that
the wheels are free, as well.

Also, there's this book/catalog/resource for car restoration that has at
least a dozen of these companies advertising.   Forgot that name as well,
but could get it.
Most new garages use versions of these, instead of the old piston in the
ground.
----------------------------
Mr. P.V.'d
formerly Droll Troll