Very interesting idea - I think it is a cool feature and I will add that to the general NFT contract very soon. Give me 3 days ok?

edit: I was too optimistic lol - okay, 3 days for the feature being in the contract, but there is still the market that needs to be done if you wanna sell the mint spots. If you want to do that manually, you can do it without a market - otherwise it will take a "few more days" to get the market online - but we are pretty close already.