We had the panel upgrade done at our previous house, along with a transfer switch and 30 amp outlet installed for our trailer, and I want to say that was like $3000. This was probably 10 or 12 years ago, so I wouldn’t expect to get that price now, but over double seems pretty hefty.
I’ve done the ethernet thing in two houses now. The first one was a single floor model, so it was relatively easy to run the wires through the attic to the rooms I wanted.
Our current house is two stories, and I wanted it in my office on the second floor and at a closet along the way for an access point. That was a bit harder!
I might need to run it to my wife’s office at some point. That one might be harder based on where she’ll need it, compared to the stairs.