PRINTERS AND OTHER PERIPHERAL DEVICE INSTALL AND SETUP

WI-FI OR CABLE PRINTER?

You would be hard pushed to find any reasonably priced printer out there today that doesn't have Wi-Fi capability. It will also connect using a USB cable, but some, for a bit more money will connect using a network cable.
Why use a cable if you have Wi-Fi? Speed, reliability of connection, ease of setup, and some function just work better or need a cable to function properly in some printers.
Wi-Fi is king though if you want to connect not just computers but mobile and tablet smart devices also. They can't connect directly, they need Wi-Fi.
But you need to connect the printer up to your router before you can start, unless you can use NFC direct print to the printer. Not many have this.

MONITORS - SCHOOL BOY ERROR

If you are going to buy a monitor new or second-hand (We have had a good experience of buying second-hand), you must make sure you check the type and number of connections it can take.
If you have a box computer, you may have lots of connection options, or just 1.
Laptops historically, unless you buy expensive or business class laptops, can often only come with one type.
So make sure you get a monitor to suite what you have, or you will be having to get onto Amazon for a conversion cable - more money. VGA, HDMI, Display port, DVI, and now USB-C, which is the magical connector that can do everything.