I didn't ask for funding help. I paid for all materials, but I had friends help with the building of the observatories.
The first was 10X16 and had a Parks 10f6 equatorial and a 17.5 inch DOB. Neither of which, belonged to me!! It worked great, the important point for sharing a observatory is to have a minimum of TWO scopes for sharing. You can do this with either one larger building or two smaller buildings.
BUT you want to two scopes for a shared observatory. I found it a real advantage to share the observatory. First, I got two large scopes to use that were not mine!!! Second, folks would come over and use the observatory on a consistent basis. So many nights I would go out and join them for a bit of time...and didn't have to close the observatory. I did have people bring their own eyepieces.
Currently, I have a ONE pier telescope and several people with keys, but it is almost never used except by me. That one pier really limits folks that use the observatory. A few have their own observatories and others don't observe enough to use mine. It does have a very expensive mount in it, which could make people shy away from using it.
We share lots of "gizmo's". Just recently, a friend was looking for a "piece" that he had misplaced. It was at my observatory and had been there for a year!! So I would just mark each persons stuff.
Your dealing with other human beings. BUT in my case, sharing a observatory is great. Increased my viewing and it was great having other folks to use the scopes. Just be sure you have more than one scope in it.
Edited by vsteblina, 01 October 2019 - 10:33 AM.