@UngainlyTitan
I do think Teleportation Circle should have had a clause that if you are merely recasting it to make it permanent, it doesn't consume a material component.
If you don't want to change it, you could simply add something that modifies it. Perhaps making a teleportation circle permanent on a ley line only takes a month, or only a week if cast on a nexus of ley lines.
I do prefer some impediments to permanent circles, otherwise it could be hard to justify why they aren't everywhere. Common teleportation circles would be fine for the right setting, but certainly not for every setting.