Crushed Limestone Foundation

Not sure where to post this. What would be a reasonable price to have a 25×45 crushed limestone foundation/pad built? Five or six 14 yard loads of crushed limestone delivered (from less than 5 miles away), ground compacted, each load compacted and sprayed down with water, and laser leveled. Central TX. 3-4 inches thick.

I just calculated that 14 cubic yards would provide material for 4" thick 25x45' layer. So you are looking for 20-24" thick pad.
I have compacted myself similar 4" pad of baserock for my house. 16 cubic yards were delivered for $600. I have rented plate compactor for 3 days - $250. I have my own transit and other tools. It took me 15 hours to do it mostly by myself. It was major workout. I did it 8 years ago.
Some contractors may want to use shortcut and tell you that riding a skidsteer over spread material will compact it. Well, if that was a case why to sell compactors, rollers, etc? Foundation has to be done the best you can, so please pay attention to proper compaction.

Billy, what do you intend to do with this pad?  Is it for a shed, a house, a parking spot?

The main consideration for any rock foundation is what kind of soil, specifically, you have, how it's going to support rock.   Is the intended location of the pad going to be affected by ground, and/or surface water in a very rainy year?