Only for 1.21 features enabled! Containes new copper blocks.
(When you create a new 1.20.4 world in the More tab you can enable 1.21 Features in Data Packs or Experiments)

This is a WorldEdit schematic.

A relatively small double-floored house with smelting, brewing, enchanting rooms, and a bedroom - can be considered a starter base. The first floor is fully furnished (item frames and armorstands are missing in the schematics though), and the second floor is empty - up to your needs.

You can use it for whatever you want, though do not claim it as your idea. Have fun.