Well, maybe. You don't save $ by having "control over your shipments", you'd save by making your shipping system more efficient than alternative shippers. FedEx & UPS are pretty darn good at it and have a lot of experience. Trying to break into that game would be costly and maybe foolhardy. Just the fleet management alone could be enough to eat up any "savings". Selling the service to other companies in addition to delivering your own stuff might work albeit not immediately profitable.
It might work out but I think you'd have to throw a lot of money at it to prime the pump.