Hi, this is just a quick idea/ cheap alternative, we had some trouble a while back but i was skint and in a similar position, i got one of my old mobile phones (nokia 6600) and installed a motion detection application, which did the majority of the aforementioned features (uploading to an ftp server etc) but all over GSM,

a nokia 6600 these days will go for nowt, and i can vouch the pictures would be good enough to recognise you is doing it, ill have a trawl around the net now to see if i can find more information

Here we Go!!

just scroll down about a 5th of the page and there is a heading Motion Camera

there are also links to download the app good luck