And these cars are free to "rent" 15 days in a year just by having the NFT? For whatever and wherever the holders want to or will it be only to and from their place to the venue where the even is being held?
You can rent for 15 days by year (or 2x7 days)
You can use it for events or not
There s a km limit for free (100km / day)
I can begin to see the very possible complications rised from this feature. It is not too far fetched to say that these free car rent is one of your feature, one that supposedly will attract buyers and holders to your NFT. But this feature will only be beneficial and appealing to people who lives around your proximity.
I don't know where you're located at, but let's say (to give a better illustration) you're in New York, your special selling point will rather be useless for people in New Zealand or London or Singapore.
It could even backfire into a situation where people from every other part of the world refrained from owning your NFT because they think it's rather useless as they can't use the feature, which effectively narrowed your market into people in your proximity only