I'd imagine a remote pump/reservoir mounted on the wall close to the lift with lines running along the floor. Unlike a 2 or 4 post that has the pump and reservoir mounted to it. A neat setup.
My thoughts are you need a few of these Phil, or possibly a second floor that you can drive onto located in the detached garage.
Actually, now that I'm thinking of it..... you need both!! The floor and the lifts!!
Cheers
Dave