Racer's Lounge - Cost of concrete for garage floor

I am looking into buying a house with a huge detached garage that is 45'x35'. The house was originally a farm so the garage was only used to store farm equipment and therefore does not have a concrete slab. Does anyone know what this would cost to pour? Also I should mention that eventually I want to put a lift in which usually requires 3-4000psi concrete at a minimum thickness of 4.25 inches. I just want to know what I am possibly getting myself into.

If you do ALL prep/frame work I would say a minimum of 4-5k.

call a couple of places and ask for a quote. at 5 inches thick, you would need 24.3 cubic yards for just the slab.

Pre-mixed concrete around here is $110 per cu. yard. That + delivery + all prep work + rebar. It ain't cheap; that's for sure.

You could opt to pour only where the lift is going & then do the rest w/ ground up asphalt over gravel. You can get the ground up stuff that will re-stick together when it gets hot outside. So, you can spread it & then it will become a similar consistency to an asphalt road. It won't be nearly as good as a road, but, will be better than just loose gravel. Typically, the ground up asphalt is $17 per cu. yard + delivery.