Been meaning to do this myself for a while! I plan to use paperless-ngx, as it seems to be a bit of a standard. You have to handle the hosting (or not? Maybe there's a managed server) but other than that it seems to just work and has a bit of a community behind it.

This is an amazing, 360 outlook to a question I'm looking to answer a similar version of. Thank you for sharing it!

When bluesky inevitably sweeps bot followers away, we will miss you jaacka, and quvieequ, and oh dogcatdogcatdogcat, we will miss you most of all.