You need a level 6" concrete pad. No matter what your plan is. Last I looked, 2 post lifts can be bought new for $1500 to less than $2795 delivered and installed. They're rated at 8-11,000lbs in that price range. I'm pretty sure the Quick lift commercial shows it is secured to bolts in the level concrete floor just like a 2 post, but are compact, to be removable if space is an issue. Your hubby will still be on his back with a quick-lift to change oil, swap trannys, do exhaust etc.
I imagine quick lifts would be good for body work, and buffing the lower 1/3 of the car. Not so good for a "mechanic" working under a car.
Your considering doing this on a dirt driveway?!
With an unsecured lift?
That is suicide.
Even at full lift of just 3ft 3in.
Quick Lifts are as much as a cheap 2 post, half what a name brand 11,000Lb lift cost. $99/mo x 36
Concrete isn't expensive, nor is the pizza and beer for friends to help smooth it. Well under $700 for cement, framing, beer and pizza. And the framing can be reused for the building.
Funerals run $8,000-$12,000.
A month in hospital is $250,000.
Wheelchairs are very cheap 2nd hand.
It looks like in your area, you could pour a nice "open air" concrete pad. Then install the lift, any lift and build the garage around it as time and money permit. IMO the quick lift isn't cheap enough, sturdy enough or lift high enough to offset me crawling on my back under a car which IMO, defeats the whole purpose of paying for a lift. A jack under the axle lifts as high as a kwik lift. Your moving sideways not forward IMO.
Once you buy a 2 post, you will never regret that decision.
Good Luck and keep us posted
