This is why I did the upgrade to 10 GBE for one PC NIC, unmanaged switch with (2) multigig ports, and the NAS add on NIC cost was ~$500 or so. I intend to replace my current switch with a 5 10 GBE ports later this year. Costs keep dropping (as they should...)
Pretty-much how I started but the price of entry has really dropped in recent years. You can get a brand-new UniFi fully-managed, fan-less, 10 GbE 8-port SFP+ switch for around £250. That is a lot of bandwidth for the money!
️