You can do this for quite a little money if you are happy to do the work yourself. I have two systems, one in Romania and the other here. I used the Floureon 8 Ch system which you can pick up for less than £100 with 4 cameras but without hard drive fitted for that price. a 500gb drive is peanuts and takes seconds to fit. The only criticism I have really is the xmeye software for remote viewing, its a bit flaky and you need activeX installed if you want to use a windows OS to view, the android and ios aps seem to work fine though. There is other software out there but I havent had chance to experiment with it yet.
I would upload some screen shots but need to resolve the photobucket thing first.
http://www.ebay.co.uk/itm/FLOUREON-8CH-Full-720P-DVR-Video-2000TVL-Outdoor-IR-CCTV-Camera-Security-System-/360898071723?epid=1088418272&hash=item5407338cab:g:HtcAAOSw4A5Yz0P5
The one in Romania is running with a mobile broadband service too, have to run No-ip to get round that but that's just fine.