I am one of the owners who is very possessive of the 37', 100+K machine. I can count on one hand the folks I would hand the keys to. This has direct impact on the topic, because the reason I only have a few is, they already own or have driven a large motorhome. The ones I do not know or know that they have not driven a large MH do not get the keys.
There is another thing that would have to be in the agreement. No one borrows or drives our rig but owners.
This partnership would have to boil down to (written) agreements and trust to remember/stick to the contract.