>>928734
Make a prototype with less door variety. Randomize the color or w/e if you need to.
Just draw doodle versions to represent the doors, or use Stable Diffusion to generate a bunch of door textures and stick them in a giant atlas, then generate normal and roughness maps of the atlas with Material Maker (very easy to do).
Don't get hung up on a requirement for a huge variety of final quality doors lol, you need to get some gameplay working and then determine if it's worth pursuing and paying some money for art.