Once a storage centre is fitted out you will always be looking for extra space to rent out (especially as the units fill up). One possibility that many people consider is to put extra storage units in outdoor areas.
Kuboid’s PSU’s provide valuable additional rental income. They can be located where you need them, even on sloping and uneven ground and anchored to tarmac or other ground materials. Such units have the advantage that they can be split internally into different sized spaces and they can also be moved quite easily around a yard or forecourt.