The only concern I would have is that yes, a garage easily handles a vehicle, but the weight is distributed over a large footprint with each tire supporting roughly 1/4 of the weight.

I would fine the most level spot on the garage floor that is convienent to where you want to work. If you have any cracking of the concreate now, try to determine the area that is falling (this may only be a few mm) and do not place it there. That amount of weight on a small footprint will accelerate the problem.