I have to mention something that I have learned from doing this for almost 10 years now.
When I first started, I didnt have that many props.
Now I take up an entire storage room and another shed.
I am starting on new props and I have discovered that I am missing stuff.
I use rubber made tubs to store stuff.
This year I am going to get stick on labels and write down everything that is in the tub. It is going to take more time storing stuff away but right now I am suffering because I have no idea where things are. I have about 30 tubs and it is a pain to look through all of them for one mask.