You are welcome. Just sharing my experiences. Two of the things I like most about a streamer/server set-up are how easy it is to operate and the wide range of music available that I wouldn't have otherwise found out about. Just yesterday, I learned about three artists I was previously unaware of who are creating music that is similar to other artists I listen to.
Regarding your hard-wired connection, that is for sure the best way to go, IME. I have both fiber and Ethernet available over my 45-foot run so I can easily switch between them. I have done so several times over the past couple of years, and I cannot reliably say I hear a difference - at least to the point where I would be comfortable saying I could tell one from the other based on a blind listening session.
Regarding mesh networks, in my experience with residential applications, they are generally preferable to a single router when needed to provide internet over longer distances and they are certainly preferable to using boosters. My outdoor system, which is set up in the garage, is connected to an Orbi mesh satellite, which has Ethernet jacks for hardwiring so, the signal travels wirelessly from my base router over the mesh network to the satellite and then over a short Ethernet cable to a Roon endpoint that feeds a DAC. That set-up has been great functionally but I cannot comment on whether there are any sound quality differences compared to a hardwired connection directly from the base router, which I what I have always done for my main system.