Investing in storage units for my multifamily property

[Stephen Jones]

I own 16 multifamily units in Illinois with a sizable backyard. I am considering building 16 storage units for my tenants. In my area, multifamily properties that have storage units is very rare. Briefly, My idea is to build these units 10x10. I want to do this project right and not half ***, so by my calculations this is going to run me somewhere in the ballpark of 40,000$ w/ labor, materials, concrete, etc. I would in turn charge my tenants anywhere between 45-65$ to rent out their designated unit. Is this a good investment? Or should I focus more of my attention and money on accumulating more multifamily units? Thanks!