Self-storage facilities based on Access List

Buy one of these - password protected - 1mil m3 of space + 500 items x10:

I think you could put them in corp hangars with shared access with your name on it and password protection. Share password with trusted (hmm…) ppl.

The only drawback is that you must assembly them in stations with industry service. And once assembled you need 10k m3 of cargo-hold to move them repackaged.