That you probably need a VPS for, yes.

You forgot something in your calculations, you don’t need a complete VPS for the *arrs. App hosting/seedboxes are enough for that and you can have them for very, very cheap.

Depending on where you are, a hard drive that runs 24/7 can cost you quite a bit of money (6$/month or even more for just the hard drive). If you consider the upfront cost of a hard drive, the benefit of hosting at home gets even smaller. Nvme is where you really save money hosting at home. Personally I do both, because cloud is cheap and you can have crazy bandwiths.

I’m not sure if you are being serious, but for obvious reasons NO

I abandoned my lifetime plex license long ago. It’s the sunk cost fallacy, some people are immune to it and others aren’t. Quite obviously some people here aren’t, because they still defend plex.

In another comment you complained about the latest commit being made 7 years ago. Just a heads up, this project also seems pretty abandoned.

I use dokuwiki for years now. It’s not that pretty but it works well. No dark mode though afaik