[Blueface]

Netgear makes a nifty device that I use for my home's security system so I can monitor it on my computer.
You get two parts that plug in the wall's outlet.
One receives the ethernet cable from your source.
The other gets plugged in an outlet where you want internet and you plug another ethernet to that and then to your computer.
You basically get the internet signal via your home's electrical outlet.
Quite cool and only $79 back when I bought it about four years ago.
I bet there is more modern stuff now.

Laptops can be had for $399 that fit your need.