There is a possibility that my beloved MINI may need to be stored for a year or more should I be offered the job I am pursuing, and I was wondering what I else I might need to do to store it properly besides disconnecting the battery and putting it on jack stands?
I'll add:
Putting it on jackstands isn't a great idea. Leaving the suspension unloaded in full droop that long isn't a good thing.
It will also flat spot the tires so either get crap tires you'll be OK with tossing or get some of the bolt on wheel stands.

Or get someone to drive it occasionally.
Also you'll want to heavily treat the interior plastics. Preferably with a UV protectant like 303 Aerospace.
Brand new coolant with maybe an extra dose of anticorrosive additive.