My day job is working for big enterprises setting up self-hosted solutions like this. Yes, it's work and upkeep, and they do need in-house specialists, but you already know that if you're self-hosting... that's kind of the point... If they didn't have in-house specialists they would use the dedicated managed cloud hosting.

The only purpose to self-hosting is because you can't use the dedicated managed cloud, such as due to regulations, contractual stipulations, networking limitations. If you're already in that situation and you don't have the headcount to manage this technology, you're screwed.

So, again, for the vendor, providing self-hosted is as easy as "here is a binary, here's some docs, good luck to you". If the client can't hack it... they shouldn't be doing self-hosted. It's self hosted, not we'll help you host it.