if you are gonna invest in this, go with a security agency who will also help upkeep the system. In four years, or so, your house will be full of new brothers and it is easier if there is an agency or whatever to help keep the system, knowledge like this gets lost.
lol i don't know if i'd want our house under camera though... that stuff is too 'Skull'ish to me.
not that i don't love my sisters!