make item available only for special accounts

[mega-stoffel]

we're expecting many new cargobikes in Stuttgart due to the funding by the city.
Not all people might be happy to share their bike with all people on our platform, but maybe they would be happy to share their bike with their known neighbors and friends.
Therefore I'd like to propose this enhancement:
Add the possibility to restrict the visibility of the rented item (i.e. cargobike) to special users.
For example: We add a Bike_A to the website and make Person_A its "admin". This admin can add Person_B and Person_C to the people, who can see - and therefore rent - this bike.
We don't have requests for this kind of rentals, yet - so there's currently no real need for it. But I think, we might use it, once it's available. But if it's too hard to impement it, maybe it's not worth to try.

[flegfleg]

Hi,
could this be solved by a "private" url?
otherwise, it would be a lot of ui/manangement.