By the time he starts stuffing things in there, there wont be much floor visible
Mate I bought a container which is 12x2.5 meters.
I stuck it right next to one the same that my dad uses for filing and storing his "rubbish".
We both have a car stored in each of them but the only thing I've got an issue with, is EXCESSIVE HEAT !!!
You cant catch your breath in the summer when you open up the doors.
Plan is to place them next to each other been 6 or more meters apart, and make a steel structure as a roof to get away with direct sun and heavy rain.
Pooring concrete though to make that space will cost a lot, not to mention the cost of the roof structure and cost of fencing around.
Same thing as what I'm planning to do has been done to one of our bus stations. One of the containers has tools, spare parts, oils, gaskets etc, and the other container has tyres stored inside.
The space in between is used to service big buses and coaches, and its quite large and comfy to work !
A door has been opened on the side of one of those containers for easier access, and it works perfectly !
Last year we had both snow and over 40 degrees in that area, and there were no problems whatsoever.
Doable, bit costly, but yours
No rent, no big deposit, no huge electricity bills, no landlord :P