When to complete Rental Updates

[Gerald Knott]

What to get an opinion from fellow investors on a situation with a current owner occupied rental. The goal now is to find and move into the next property but there is only one electric meter for the property zoned duplex.

Should I spend the money set aside for electrical upgrades or another option is cosmetic upgrades need for the out dated unit to include flooring, windows and new cabinets and figure out a way to charge electricity to both units and charge more for rent with proper upgrades. What methods have proven successful when having the electric with one meter?