I don't hang my planes by there props I think there would be more stress on the bering that way than some fuel. if your worried about the bering's then use a little after run oil in the motor after you run all the fuel out at the end of the day,I use a little WD-40 or 3in1 oil but there are many others that will work well.

from what I have been told if you use after run oil and set your planes on there nose the the oil seeps into the bering area to help lube them over time the space that they are in is real tite so I dont know how much liquid gets in there any way, but every body has there own ways of doing things.

as for a plane hangar what I do is use adjustable shelf standards and shelf brackets with plumbing insulation for padding, then you can adjust them for wings and fuselage accordingly keeps them on the wall like yours but in a horizontal attitude no stress on the engine or airframe.

BTW you have a nice collection there I followed your P-40 thread turned out nice.
here is a couple of photos of my set up one by the T.V. for watching sports while building got to have that! and over my building surface, working on a P-47 build now the fuse on the rack getting the P-40 ready for flying and setting up for the wing building.