Hmmm, 600 miles, stepdeck, full tarps, crossing Ohio, I assume not overweight or overdimension. . . I would expect that to cost between $1500 and $1800 per load. 175 loads at $1500 is $262,000, and 200 loads at $1800 is $360,000 for a rough estimate. You may be able to move it cheaper with some cut rate carriers, or it might cost more if you want one truck every day guaranteed and the freight into your area or out of the destination area is cheap/slow.
You have three choices for getting the freight moved.
1) You can call a flatbed company like TMC transportation. They will arrange everything and may even be able to set up a dedicated route with two or three drivers handling all your freight. This would give you the most predictable rate and delivery.
2) You can contact a broker in your area who will find trucks on a load by load basis. Some loads may be cheap and some may cost more.
3) You can look into posting your loads directly on load boards such as
www.getloaded.com and
www.internettruckstop.com. In this case you will need someone at your office to negotiate with carriers for each load on payment terms and such. This will require the most work on your part but you may be able to move the loads for closer to $1200 to $1500 per load.
Good luck.
__________________
Nothing is foolproof to a talented fool.
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The Road goes ever on and on
Down from the door where it began.
Now far ahead the Road has gone,
And I must follow, if I can,
Pursuing it with eager feet,
Until it joins some larger way
Where many paths and errands meet.
And whither then? I cannot say.
-- J R R Tolkien