what is the best way to handle big loads ?

Lease a trailer. You get around inspections and dot problems the trailer is maintained by the leaser. Contract the hauling to a freight hauler.

The demon in large loads is the trucking, you can certainly get the interest of end users (especially if you can steadily provide those kind of numbers). Your ace in the hole is contacting flatbed truckers (via a trucking terminal that routes loads) and looking for dead-headers or partials. $4.00plus diesel forces them to make every mile pay. Mostly owner/operators they can handle odd loads and are much better to deal with than corporate prima-donna van drivers. Get communication going early. Great score, had a few whales myself over the years and learned the hard way when trucking ate all the profit. Best of luck!!