Something else I should mention....the choice of storage will affect
how many problems you have with rust.

Enclosed storage slows and tempers the temperature and humidity changes
that the contents are exposed to. In my experience, there are days
where I will not open the shop doors because of the cold equipment
within and the warm/humid air outside. The only equipment I have ever
had rust problems with are those who are exposed to the open air, never
the stuff inside the closed cabinet. While having chucks, jigs, rotary
tables and index heads stored on open shelves is very convenient, it
also exposes them to any moisture ladened air that might enter on these
rust inducing days.

TMT