I am turning this 30'x15' dog run into a chicken coop/run. I am covering the chain link in hardware cloth and burying it 12" deep. The top will be covered as well. When I was at the feed store looking at coops to put inside it a customer was telling me that they are a waste of money and can't hold as many full grown chickens as they say. She has been raising chickens, ducks, and guineas for years and suggested covering the far end in tarp. Meaning the back end, both sides about 6", and the roof. (The sheltered end would be 15'x6' and 6' tall with one 15' side open.) And then putting some roosting bars, nesting boxes and feed and water in the sheltered end. Would this be enough protection from the elements for them? Or should I get some sort of coop in there too? Also how many hens would y'all suggest in this set up?