To do a job by contract (instead of by an hourly wage); to hire or charter (s.t. as a plane, jeep, or boat); to lease s.t.; to buy a large amount of s.t. at a wholesale price.
Uncle Jul often buys tuna wholesale in large quantities.
If you can't handle building your house, contract it out to someone.
If he isn't pleased to work by the day, let him do it by contract.
Charter that boat if you want to leave in a hurry to Palawan.