Help! Dad doesn't want to drive any more, he wants to have drivers!

OP, Your dad knows the game. He knows what to do and how to get it done.

The advice I would give is don't be a cheap micromanaging owner.

The other advice I would give is to do it right, lawyer, accountant and other tools are needed.

Good luck finding drivers.

AND if someone is working for themselves, they are not dispatching themselves.