Just a bit of an update,
I have made a project to create the cheapest possible fantasy ogre kingdoms army by using second hand sources, so far i have spent 49 Pounds and have got, The army book, A tyrant, A butcher, 18 Bulls, 4 Leadbelchers, all second hand but i am stripping them and repainting them, the army is about 1100 points which is not bad for a tad under 50 quid.
As for starting a new army i would go straight for the battalion from a 3rd party supplier as GW just hiked the prices and they are now about 60 pounds a piece.