HERE for a picture of how the Navy customized WinCam for a solar-powered wireless application. Which is tried and tested and works very well. This is do-able, but I'm not familiar with WinCam's response to a 2400 baud connection. WinCam Live has been used on satellite modem and cell modems down to 9600 and 4800 baud, but I don't know how well it can sync up at 2400 baud. You would have to set up a test scenario with that particular equipment.
Additional lenses are available.
See the product list for choices and prices. Although the Capture Host software does have a motion detection feature. It is better to take advantage of WinCam's single cable design and keep the modem, phone line and mains power in a building or structure away from the actual camera installation, which often ends up on a pole or rooftop. As we all know it can get pretty warm in an outdoor enclosure on a hot day. And running mains power to an outdoor installation can be a pain.