Nearly any home network wireless access point will have no issue managing to support the number of wireless devices there. However, if all WiFi computers attempt to use the network at the same time, performance slowdowns can result.
All devices connecting to an Ethernet router must possess a working Ethernet network adapter. All devices connecting a wireless access point must possess a working WiFi network adapter.
Optional Components - Networking of Internet access, printers, game consoles and other entertainment devices is not required for either the router or access point to function. Simply omit any of these components shown that do not exist in your layout.
You can choose which devices to connect to the router and which to the wireless access point. Additional network adapters may be needed to convert some Ethernet devices, particularly printers and game consoles, to work wirelessly.
Limitations - The WiFi portion of the network will function only to the limit of the wireless access point's range. The range of WiFi equipment varies depending on many factors including layout of the home and any radio interference that may be present.
If the wireless router does not support enough Ethernet connections, add a secondary device like a network switch to expand the wired portion of the layout.