A 30×100 mini storage building could provide you with up to 3,000 sqft of space, which could be used to create ten individual containers which are 30×10 in diameter.
The benefit of using prefabricated kits is that there are faster construction times, each building is more affordable, and they are resistant to the weather.
This is because each of the parts is manufactured elsewhere, then brought to your location for assembly.
In some cases, your kit could be built within a few weeks, or even a few days depending on the size of the package as well as your experience.