2 to every wallplate 2 to every known TV and even some dream TV locations i.e. garage and patio I would also ask for smurf tubing here 2 to Audio cabinet if applicable smurf tube here as well Every potential security camera spot Door bell location Potential WAP locations If ever adding an ADU I’d run smurf tube to the nearest corner of the house to that structure

If you aren’t sure about a location, smurf tube it

Great router as long as your ok with Amazon having limitless access to everything

If those are my only choices I’d go Honeywell. Nest is easy to operate, but you’re married to Google where the Honeywell works with other home integration software.

I’m pretty biased against Google and nest so take that with a grain of salt

It might be easier to do it externally to the TV. I think some higher end hdmi switches can accommodate something like this and may allow source 1 to continue playing while source 2 pops in. The problem with doing it on the TV itself is that usually if you use smart TV functions you’ll have to start over again at the main menu when it switches back

Any time I hear “wired in the 70’s” I cringe a little. Have you had a really good inspection of your wiring? It’s super common in the 70’s that they used aluminum wire and if that’s the case I’d look into upgrading that before I did anything else.

Former electrician here… caseta, maestro or higher if it’s in your price range… yes it’s expensive, but hands down the most reliable and secure system there is. IMHO there is no other choice

Fiber… that being said, it wouldn’t cost much to run a few ethernets out as a failsafe.