That's not too many requests, but running any form of a home network would still benefit moderately from a local DNS server. You could even install something like dnsmasq on the most heavy-using boxes to cache lookups locally.

Granted, I'm saying this as yet another home-network admin who hasn't quite... ahem... gotten around to installing a DNS server. ^_^; I'm mostly sharing this here in case someone else has a similar problem and wants a solution.