Is it expensive to set up a site?
its depends on how much you want to spent and what you want
the 3 cameras at Stawell and Bendigo are privately setup and just share images to Railpage
I think Gavin from stawell started its all with his first setup and still being used
Stawell railcam is
Swann USB Digital Video Recorder SW241-UD4 with a swan cctv Analogue camera.
the only problem with this setup is the very low res images and you need a computer running all the time.
Stawell Station & Golden Square (Bendigo)
Both cameras are Foscam fi9805w cost about $200
They take 3 images when set off and just need power and internet