I know it's possible to monitor usage for specific circuits using a few different device options. 

Property/Deal Profile General Guidelines Purchase Price 700,000 1 Percent Rule (%) 0.857142857 Down Payment (%) 3.50% 50 Percent Rule 3000 Down Payment ($) 24500 Cap Rate 8.214857143 Interest 4% Cash-on-Cash Return 26.73744578 Term (years) 30 Loan amount 687,321 Income Cash Flow Rental Income 1 2500 Total Monthly Income 6000 Rental Income 2 3500 Total Monthly Expenses 5075.33 Laundry Income Storage Income Misc Income Total Monthly Cash Flow 924.67 Total Monthly Income 6,000 Total Annual Cash Flow 11096.04 Expenses Cash-on-Cash Return Taxes 750 Down Payment 24500 Insurance 58 Closing Costs 0 Water/Sewer Rehab Budget 30000 Garbage Misc Other -13000 Electric Gas Total Investment 41500 HOA Fees Lawn/Snow Vacancy 200 Repairs 200 CapEx Property Mgmt.

In the basement there is rooms available to rent as storage units as I am thinking about doing for additional income. 

One better would be self storage. http://bit.ly/2CILuJ2

A couple of days ago he said he would retrieve it yesterday and still has not taken it.Please advise me of what I can do:  can i charge storage fee (how much/day)?

Offer accepted on my first deal (triplex) and inspection pending (WA State).During my initial walk-through, I met a couple who seemed to be more than knowledgeable about the property, possessed keys to storage areas (possibly other units too), had special parking spaces, and stated that they take care of the things around the place including the large yard in exchange for lower rent.

I invest in self storage due to the good returns and the nature of the business.Ultimately you may end up trying a few different avenues until you find the one that you like best!

@Robert Shelton I have a good friend and sometime business partner who owns a marine service and storage business in North Charleston. 

I will use the pad to park portable storage units to rent.

I was approached by a realtor/broker/developer to do a larger storage project.