User blog comment:HarleyandJoker007/Do You Have To Pay To Make A Wiki?/@comment-1330470-20130721163145

Goodness! The only things Wikia would charge you for would be to advertise on Wikia, or to have a wiki with no advertisement. Most likely, neither of that is important to you, so no need to worry.

If the wikis are going to be about popular subjects, like Pokémon, you might use the search to find out if a wiki already exists. Feel free to make a duplicate, but consider contributing to one that exists.