I have access to an old greenhouse (fiberglass) that has power and water but has a few holes plus gravel (not ideal for cement) ground. It is very dirty/dusty as well. My question for the wise ones ... is it better to use it as shelter, accessing the power/water and have a few tents in there OR do I patch/insulate this thing up (we get wet winters) and deal with the floor. Problem is time and money is always a factor. Your suggestions/ideas are always appreciated.