How to analyze a Storage Facility

[Wala Habiby]

Good evening everyone, 

Trying to learn more about storage facility ownership and management. I am considering a small complex with less than 70 storage units probably to start off with. 
Few questions:
1) Anything I should be aware off specific for storage complexes other than the normal commercial property issues? 
2) Any software or excel sheet anyone can share with me to help me analysis a deal?

Anything anyone can add would be helpful as I have 16 residential properties and partnership in a shopping center but this side of the business is brand-new to me. 

Thank you everyone.