What software did you end up using? I see mention of Digi-Watcher.
One image per second is pretty serious, but it is supposed to be a quasi-video feed. For the image src line, you should include height (288) and width (352) so web browsers can allocate screen space for the image. When it cycles, or misses loading an image, the page collapses.
Based on the one image I grabbed at 37k, that works out to about 3 gigs per day. Maybe someone can check my math, but that's a lot of uploading (~100 Gigs per month).