The first one has great space. I can only tell so much from the pictures as to the condition of it. I can tell that it was not built by code or even the best building practices. However, it is for chickens to live in and not humans.
I do not see all the metal that was mentioned by someone. I do see a metal roof over osb plywood. The metal on top of the osb will not increase heat in the coop. It will actually be as cool or cooler that way than with asphalt shingles. The siding does not appear to be metal?? But, even if it is should not be problem. You are in Michigan. I am in Alabama and my coop is metal siding and roof. As long as you have very good ventilation you will be fine with that. You would definitely need to add ventilation no matter what it is constructed out of.
You could do a lot with that and have a lot of space for the chicken math to kick in. Of course the other can work as well, just not as well for the chicken math and you do not already have a run with the smaller one.
Personally, I would work with the big one as long it is not in such bad shape that it just does not make sense to. I think the biggest thing would be figuring out how I would do the ventilation in it.
I do not see all the metal that was mentioned by someone. I do see a metal roof over osb plywood. The metal on top of the osb will not increase heat in the coop. It will actually be as cool or cooler that way than with asphalt shingles. The siding does not appear to be metal?? But, even if it is should not be problem. You are in Michigan. I am in Alabama and my coop is metal siding and roof. As long as you have very good ventilation you will be fine with that. You would definitely need to add ventilation no matter what it is constructed out of.
You could do a lot with that and have a lot of space for the chicken math to kick in. Of course the other can work as well, just not as well for the chicken math and you do not already have a run with the smaller one.
Personally, I would work with the big one as long it is not in such bad shape that it just does not make sense to. I think the biggest thing would be figuring out how I would do the ventilation in it.