Prime Investment Property. There is 6600 square feet plus a small storage shed. Another great feature is that there are 6 individual storage units built under the main building that you can drive up to. As of now there are four (4) tenants that have signed a three-year lease with a 3-year option. Cap Rate is 7.6%. The additional passive income from the 6 storage units leased out at $25 a unit per month, the Cap Rate will be 8.12%.