I keep searching for the "right" coop. These are the arguments I've seen: 1) A 1930s study continues to be referenced about an open coop with a roof and its success. The research showed that one back solid wall and 3 heavy gauge wire walls were optimal for chicken health and ventilation and that weather was not an issue. Study was done in Minnesota. I live in Texas, so this is of interest to me. 2) The enclosed coop with 4 solid walls (except for windows and roof corner ventilation nooks) seems to be the majority of types of coops advertised. Because this seems to be the predominant style, whether it's tractor or stationary coop, I wonder if this is the way to go. Proper ventilation seems like the crucial factor because I don't want to end up with diseased birds and unhealthy conditions. I need some advice. What I see is the huge difference in cost. Enclosed coops are outrageous and people like me are not talented when it comes to building a coop. In addition to your personal thoughts about the above ideas, I would also like to hear if there is any coop builder who is reasonable with cost, does quality work with quality materials, and is not out to retire based on one more purchase (mine!).