day pics..unknown area/need advise to turn into a greenhouse

[bizzarbazzar]

This area, we are not sure what its for. We have decided to turn into a grow house/greenhouse (as opposed to a guest house we were originally contemplating). It has a roof and walls but no front at all. The floor is cement and we thought for potted tomatoes. We have ripped up enough cement in the yard that had way to much cement, we figure we will keep it that way. We want to utilize this area. Any advise on steps to take to do this? Please no ideas about tearing the whole thing down and starting over. Thanks all. Here are some pics I just took, its dark out but you might get the general idea.







Thanks everyone for your time