[simoncion]

> Running both everywhere would require you to buy and terminate twice as much cable as you expect to use...

Ah. Let's play with that logic a bit:

"Running Ethernet cabling everywhere would require you to buy and terminate far more than twice as much cable as you expect to use. Just run power cables and wire up one extra outlet for a HomePlug in each room.".

Yeah, that checks out. "Powerline Ethernet" devices are actually pretty good these days, and are right around your magic price range... Amazon has them at ~13 USD per unit. [0] Why would anyone bother running a second cable to each room? Thirteen bucks per room has to be way less than the materials and labor cost for the cable run. Doing anything else is, like, really stupid. Don't you agree?

Anyway. You expect to use the cabling that you plan to install... plus some extra for screwups, man.

[0] <https://www.amazon.com/Linksys-PLEK500-Homeplug-AV2-Powerlin...>