I mean - old you need much knowledge? My current coop is like ths one: http://www.gumtree.com.au/s-ad/capalaba/pet-products/chicken-coop-new-bne-ipsw-twba-wrwk/1012276987 But I want to get a run to attach to the front (as they spend a lot of the day in it, as I'm at work). They make them for this coop - but I can't find one locally (they are all with long waits). I just want a cage about 1.5m x 2m, obviously with a roof. Do you think it would be very hard? And would it be expensive?