You don't really want an all metal one (or at least not without significant modifications). Metal heats/cools quickly, so will get lots of condensation with chickens in it, plus will not provide ANY moderation of temps for the chooks (from heat nor cold), it will only act as wind-break. She would need to add insulation and/or plywood the whole inside to really make that workable. She would actually be better off with a double walled plastic one than a metal one. Add screws at joints and a cross-coop roost to hold long sidewalls together above 1/2 way mark so sidewalls don't bow. They usually have vents in gables.....And a prefab garden shed those 8x8 metal ones are likely pretty inexpensive...