Is it easy to make a chicken coop out of a rabbit hutch?

I'm thinking of buying a two tier rabbit hutch of eBay and turning it into a chicken coop with a run. It will be for 6 chickens when they are to old to be in a cardboard box and to small to put in the coop with the big chickens. Is this a good idea? I was thinking it would be easier to buy a rabbit hutch and attaching a run rather than building one from scratch. The rabbit hutch is quite big and is only £25 five miles away.

Thanks

(if you could can you put a picture if one you have made into a coop.)