No entry fee or anything. Feel free to also stop by Lief on the plaza and the Able's Sisters next to Nook's.
(Lief is selling Hibiscus and Camellias.)
If you would like to tip, I'm looking to catalog clothing, wallpaper, flooring and rugs. You can dump them on my island if they're collecting dust in your storage.
Let it rot in mine hahaha.