Depends how you want to do it, and how many cables you want to run
I got one of these a while ago :
https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1
It's POE - so a single cable going to it (it comes with a poe injector if you don't have a POE switch).
Gives me better wifi than my router did, plus does other stuff (like a guest network).
At the moment it's just sitting on my desk, but I'm aiming to mount it somewhere - and possibly buy another one for another part of the house.
... but it is a commercial grade AP - so set up isn't as straight forward (there's an app you need to use) - and then you need a controller - which can either be running on your desk top (but you lose reporting facilities if your desk top isn't on) - or (as I'm doing) run the controller on a raspberry pi - which then gives you a web front end for reporting, and controlling the guest network