I just want to bring to attention something I was just finding out thanks to this post.

I started self hosting some stuff by installing raw in arch and well… It was a pain, but worth it. Then later I found out about CasaOS, which is recommended by OP, and I agree, it was great to have it to install some more services and a lot easier. But just like OP I just found out about ZimaOS, which is announced even in casaOS project as a better system and an upgrade. So I went to check and the whole project is changing from open source in casaOs to proprietary in ZimaOs. Not content with that, in the latest release of ZimaOs they have added a one time payment to eliminate some limitations of the free version. It is still affordable and a “lifetime” license but if they have added a payment for full access once they might do it again, despite their current promises that they won’t ever make a subscription style payment.

So, careful with that project, I would recommend to avoid any solution that is proprietary or otherwise it won’t be yours in the first place. I had in mind to change from CasaOs in Debian to OpenMediaVault to handle a DAS and install casaOS on top of that. But now I have to reconsider, so far I have already seen a few worth recommendations in this post that seem nice: FreedomBox and YunoHost to mention a couple that are FOSS.