Ubiquiti or Mikrotik. No more than $400 last I checked. Per device though, so router + switch could go up to $800 - $1000.

Quite an investment I admit. But it's long-term. I don't anticipate changing that setup for like 10 years.

Ubiquitys cheapest router that can do 10 G is the edgerouter infinity which cost a lot more than 400 usd.

Hm, now I can't find the link. Probably was mistaken. Or I was looking at a severe discount on a reseller website. Can't remember.