I literally just had the exact opposite question! I've been wondering why you'd want to pay for a password manager service when you could self host it. The only reason I could think of is guaranteed high uptime, but to me (and at least in my personal use case) that seems a bit pointless, since you can have a copy of your password manager on each device, which is being synced through your server
FunnyPocketBook
There is "paperless share", which adds paperless to the share options when you click on the share button of something
I'm also using Firefly III and am wondering what exactly you would do with the integration? I'm currently using Firefly's feature to create recurrent transactions, but it would be nice if everything is handled from/with this application instead of having to update it in two different locations. Is there anything else you'd do with it? Just curious, maybe I'm missing something!
Before you go into this to make a little bit of money, you should check how much this workstation would cost you in electricity. You could rent out your GPU for computational power, but if you make less than it costs to run it, then obviously that's not wanted
Not sure how well these tools cover your needs, but this sounds a lot like an inventory/asset manager that is focused on communities rather than organisations/companies. Have a look at the ones listed here
- https://github.com/awesome-selfhosted/awesome-selfhosted#inventory-management
- https://github.com/awesome-foss/awesome-sysadmin#it-asset-management
Most of them also have a demo. I've heard a lot of good things about SnipeIT, and it looks like it can also do what you want it to do. Keep in mind though that most of these are inventory/asset managers that are intended to be used in an organisation, so the UI might be a bit ugly/cluttered/unintuitive to share it with your neighbours/church people