Here are the components that make up my professional home wifi system. I have two VLANs, one for home users and an isolated network for guests.
I also found this video extremely helpful in my set up.
Ubiquiti Networks Unifi 802.11ac Dual-Radio PRO Access Point (UAP-AC-PRO-US) (I got TWO!)
They are Power Over Ethernet, so you need to have an Ethernet backbone. The Switch includes PoE ports to power the APs.