We really did not have cash to spend so my ingenious husband created our coop out of his extensive pile of stuff he has saved for one reason or another, and lo and behold, he actually made a coop for us out of it, and now an extension for our ducks. Certainly there are more beautiful poultry farms to behold, but ours has not cost us much at all. We did use some materials that cost money but we already had on hand, so we did not count those things (i.e., we had a couple gallons of outdoor paint). Our expenses the first year of housing our chickens and now our ducks probably amount to less than 200.00. Even so, we count those as expensive eggs, considering our labor. Good thing we enjoyed ourselves.
We did choose to light our coop, PNightbird, and have dogs. We got around the cord problem by mounting a pole to the side of the coop. Our extension cord going out does not run along the ground at all, but goes from the house out to the pole and down to the coop, away from critters. Sometimes wild birds perch there is all.
You could always decide not to light your coop, I'm sad to think we are "wearing out" these particular birds as far as their laying capabilities. We get plenty of eggs!