Do options exist for sub-metering within multifamily while providing electricity with a photovoltaic system? 

Left and went to College in Pennsylvania, got my degree in Electrical Engineering Technology and my MBA.

(In advance I know some of the variable expenses are fixed and the fixed are variable.)Fixed expenses: Electricity .04653 Water and Sewer .0167 Garbage .0352 Property taxes  HOA's .05 Heating .045 Monthly insurance .024 PMI .01 Variable Landlord expenses Vacancy rate .06-.09 Repairs and maintenance .02 Capital Expenditures .08 Management fees .083 Depreciation (1/27.5)My question is this.

There's usually some shared electricity that the owner paysWater and Sewer?

We paid a cleaning fee - for professional maid service after we left.

This Block Home located in beautiful Haines City/ Lake Hamilton City has a New Architectural Shingle Roof, New Energy Star Double Pane Windows, New AC Unit, Dry Wall, Floors, Plumbing, Electric Box, PVC Windows, Wood Kitchen Cabinets, and Stainless Steel Appliances.

Adding additional ducts for HVAC, or electrical to service the room can change that of course.As far as resale valuation, to ensure true designation of the 3rd bdrm., be sure to add a functional closet.If you're going to add to the footprint, cost can depend on the type of foundation, height of addition, and total roof area to be added.Good luck!

The disadvantage is that you can't clean the outside of the upper pane very easily unless you are on a ladder.

I want a C-corp to keep my schedule E cleaned up to be attractive to lenders, I want that extra w-2 income form the C-corp.  

Appliances, and some general clean up.