I dont know if this would be an option for you but if you are near a railroad terminal you might look into a surplus communication hut, or whatever they called them. A friend scored one, plenty of electricity, enough AC to hang meat, nice lighting, secure doors. Dont know what he paid but basicly he had to haul it away and install it on his site. He is out in a rural area where there is a big railroad terminal and they had a couple of these things that were no longer being used.