As a newbie(1 month Roon user), I had transferred my old audio network (DLNA based, Multiple clients) to Roon audio network (Universal Roon system and DLNA compatible)
My old audio network
My Roon audio network
I also write a document about the detailed process, including installing Roon, using a DLNA device, using VPN to access the Roon core across WAN, using a software router to access streaming media(TIDAL, Qobuz) from China, etc.
If you can read Chinese and interested in some topic, you can get the doc file from me.