Hi Capt'n, fortunately this hangar is not 'huge' and we are also fortunate that at some time in the past it got covered in corrugated iron roofing, somewhat interesting too to look up inside and see the couple of places where boots obviously when through the thin ply when putting the iron on!
We have two hangars for our museum, both built by/for us but they are both full of 'stuff' with things like surplus tugs and potential future exhibits cluttering the exhibition space. Our storage facilities include space and racks in our, third, workshop hangar with overflow in 40' shipping containers which is very unsatisfactory. Obviously this is a lot of incentive for our museum to preserve this hangar.
I would be interested to learn more of your museum, exhibits, facilities, how you run it etc. Our museum has a site at ttp://www.aviationmuseum.co.nz/cms/index.php
...we are an all volunteer operation funded by entry charges and whatever fundraising ventures we can manage.