I believe finding an old rural warehouse or derelict building and renewing/refitting would be a better fit for your aspirations. I would certainly do this if I didn't plan on taking all my equipment around with me - have attempted to do something similar with an old railway site and gallery.

You should investigate such options, there may even be grants or incentives available. I wouldn't limit yourself to the square footage of a container if you don't have to!

Bests,
Caleb