Several sites around the lake use Stardot cameras. The ones I manage at Flightcraft and Anchor Marine are
Stardot NetcamLive cameras that sell for $425 on Amazon and provide still images and live Youtube streaming. These cameras are self contained and do not need a computer to work, just an internet connection.
An inexpensive case is also needed and the ability to mount it, run the cable and configure it. It does takes some computer skills to get it running initially
After the camera is setup you need somewhere to display it. A simple web page would do it or just use the free Youtube page.
So really the only cost is the camera, case and internet service. Beyond that it just takes the time and commitment to keep it running year after year.