I was initally going to plump with an eglu with two birds, but i baulked at the price. I really thought it would be around £200- £250 not £360ish!
So when i spied a large double rabbit hutch marked down from £120 to £40, i jumped at it. Happy as larry. Even the diy to convert it from rabbit to chicken use cost nothing as all i really needed extra was one plank of wood, a fallen 2" thick branch and a handful of nails+screws. Simple and cheap! I would estimate the coop itself has cost £45 in total if you had to buy everything. Now making the run, which you obiously get with the eglu, was easy and cheap too. I got 4 thick wooden poles for supports from a pallet and the rest of the pallet went on making the gate. All i had to buy was the wire and the overhead netting (which, admittedly i have not yet) which cost £22 (again, only for the wire).
So in total i have spent £67 getting the coop and run in order and i'm unashamedly proud of that achievement. It'll probably cost me a further £20-30 to buy the feeders and first bag of feed but that is all i expect to need in terms of what you would get free with the eglu.
So, £360 for an eglu or with ducking and diving and a sprinkle of DIY... £100? I know where i put my money.
(A side note, my coop has a a bottom that can be removed without dismantling the coop, so it's easy to clean)
Therefore i think in my experience if you have the DIY skill, time and most importantly enthusiasm you can get a brilliant coop and run for far less than the eglu. Which i think weighs most positively for the wooden argument.
However! Eglus are extremely easy to move, clean, transport and a whole host of things wooden coops and home built runs simply cant do. So if you are unable to do the DIY, want a easy way to keep a few chickens and want minimum fuss down the road with regards to cleaning and maintenance... there is really only one way to go which is the eglu way. But to make up for this you really have to stump up the dough.