I set up the router to run in "access point mode". The mini PC has Wi-Fi turned off and is permanently connected to the router via ethernet cable. The router creates a WiFi network that can be connected to wirelessly from anywhere nearby (with the password of course). The mini PC (running Windows 10 Pro) needs to be powered on by physically pressing the power button but after this I can use my laptop (running Windows 10 Home) to connect, log in, and control the mini PC via remote desktop.