I think you are facing some serious obstacles that you might end up wishing you never exposed yourself to. For example what resources are available to you if you break down in a remote area or just away from home base, worse if you have a mishap in a remote area. I wouldn't do it without some serious discussion with the aircraft owner. Who will be responsible for what.
Insurance is a biggy these days for owners in private ops, there are a whole lot more exclusions and options to reduce the premiums, it's important to know what they are, almost certainly minimum pilot quals and experience. Ours requires commercial licence and one thousand hours minimum experience, this is a selected option, the lower the experience the more you pay.
The policy clearly states that the insured must have and maintain operational control, so that rules out cross hiring to another operator without our pilots, not that we would do that anyway.
All I'm saying is be careful in what responsibilities you are accepting.