You can use these kits at any of the challenges! It's basically one good investment in subscription which allows you to not worry when and do you'll be able to buy new kits.
If you want to make your own 52 project that's lovely, let me know to follow this as I love these projects! But you shouldn't do anything just because you are 52 subscribed! Feel free to express yourself and use them as you want!
Welcome at the O, Betsy!