As others have said, the issue will be insurance. You need to think of the "what ifs". Hypothetically and simplistically, you cross hire the aircraft, the engine fails and during the subsequent inevitable landing the aircraft crashes, you are killed and so is one of your passengers. It is unsure whether or not the fatalities have occurred because you messed up the landing or because the engine failed and you had nowhere to land except where there was a tree.
Does the passenger's family sue your dependents who have just lost their husband / father for your poor piloting? Do your dependents sue the owner of the aircraft and his maintenance organisation for poor maintenance? Who conducts the maintenance? The lawyers could take years to sort out the settlements. There are to many many combinations of liability to go through one by one.
If you survived but your one of your passengers didn't then the passenger's dependents could sue you. You could lose everything because your main business is not as an operator of as you have no AOC. Then another passenger says that they were all coerced into flying with you and around you go again. I don't know what type of license you have. I don't know if your workforce are contractors or staff. I don't know who your customer is but if its landing at a mine site or private airstrip, the customer may require insurance, evidence of your qualifications etc. How will you manage fatigue?
I don't know enough details of your individual case but I get paid to provide aviation advice to companies, including insurance companies. My honest (if unpalatable) advice to you would be don't even think about this as being a sensible option.
So what's the difference between this and people dying in a car crash in a work truck and the driver only having a Private license? I would agree though you would want to be insured in either instance.