If you have a local audio/video company, give them a call. Most of the big brands have a whole product line geared towards hospitality use that gives much greater control over "smart" features. They're usually not available to the general public, but an A/V dealer should be able to hook you up

If it's cable internet and not fiber/DSL, I'd look at connecting the ISP's coax to the house's coax. Provided all of the house's coax ports are connected to a splitter, you could feed the ISP coax into the nearest port and plug the cable modem into the office port.

My mother is a fish