Gobo

You have to be in the US less than 30 days a year do get that deduction.

Stun guns

If it is caching you can always set a ttl to a lower value like 5 seconds. And systems should be clearing the dns cache on a new ifup.

Set up an internal dns server that will resolve your specific host name to an internal ip and forward everything else.

If you just want a specific site, you can use bind and response policy zones. The advantage of this is that you can now configure your dns server to take advantage of block lists on the internet and block malware/ads/tracking domains.