My first thought was to use another PC laptop that I have, which runs Windows 7, but it has annoying habits of losing the WiFi connection every few days and needs a reboot each time that happens, so that is not a good system for a weather station.

My question is, how easy would it be to migrate to the RP? I only have WiFi access in the room where my weather console will be, no Ethernet.
Can the Meteohub SD card only run Meteohub? - I also have a webcam which currently runs FSWebcam software on Linux, can I run that as well as Meteohub on RP?
Can I set the RP completely from start to finish without a keyboard and mouse and display, by logging in remotely over the WiFi network via SSH, or do I need to have those peripherals to set things up initially?
I am trying to decide what exactly I need besides the RP, a power supply, an SD Card, a WiFi USB dongle and a case.
Thanking you in advance,
David