Everyone’s prohibitive level is different, but 10GbE connectivity has come down a lot in the last 5 years and is (IMO) reasonable for home backbone and select machine connectivity for techies now.
I went 10Gb for that and 2.5Gb to the kids’ desktops (with a 10Gb uplink) and I think the entire network setup was well under $1000 for 2 servers and 3 computers (1 10Gb, 2 2.5Gb).
The switches and fiber link will be in service for 10 years in all likelihood, making it feel pretty reasonable to me.
I went 10Gb for that and 2.5Gb to the kids’ desktops (with a 10Gb uplink) and I think the entire network setup was well under $1000 for 2 servers and 3 computers (1 10Gb, 2 2.5Gb). The switches and fiber link will be in service for 10 years in all likelihood, making it feel pretty reasonable to me.