I have 4600 SF over two stories and a 600SF pinball house behind the garage. After trying a few systems I have happily settled on Eero. It’s extremely simple to setup and can be easily expanded or upgraded (I haven’t needed to) by purchasing new plug in units.
I have a cable modem plugged into an Eero by Cat 5 and the rest are wireless plugged into wall outlets. This is, by far, the easiest system I have owned. Also, I like the ease of use on the iPhone app.
Best of luck.