I think $700-800 for a server with SFP ports sounds like good value in terms of price relative to capability, but the absolute price and capability are probably overkill for a residential use-case (even a homelab one). It's a no-brainer if you're the Other Linus (the Tech Tips one) and have unlimited budget for all the latest electro-bling in your house, but if you're any sort of normal person you don't need 10 gig networking yet.
Does Minisforum make anything with 4 ethernet ports and a <100W TDP in the <$300 range? If so, get that instead.