I bought the house that needed a new roof, water heater and some electrical panel upgrades.

I am also interested in investing in other Real Estate opportunities.For the moment, I travel the country installing Solar Panel and my next site is in Amsterdam, N.Y. any BP members in the area???

But now it's also connected to a complete fire sprinkler system that I installed throughout the building.Case in point...plumbing behind shower diverter...sub-panel ???

I only have one electric panel so I'd like to get a sub meter so I can charge them for electricity (don't want to charge them a fixed rate but the actual cost of their portion of the electric).Any recommendations for the best brand to buy?

Needs:Cabinets/countertops All appliances in kitchenTile in kitchen Wiring brought up to codeFans/fixtures in every room Asbestos tile removal  Carpet in rooms laminate in living room hallways Central air (furnace brand new)Paint/Baseboard replacement Minor Sheetrock work New roof soffits/guttersoutlets replacedpannel rewiring (the house was built in the early 60's)windowsbedroom doorspaintwood panel remove in two bedrooms with no sheetrock behind it small not load bearing wall demo  I know This is asking for a lot but I really don't know and I know numbers make or break a deal.

@Everest Jordan, I recently listened to an expert panel discussion with James Eng, Dino Pierce, Jonathan Twombly and Jeremy Roll.They had some interesting things to say from a macro point of view.James, Jonathan, and Jeremy were certainly advising caution.For example, James Eng mentioned that he looks at dozens of T12's every day and what he is noticing is that the rents are flat, so at the moment there is no ability to drive rent growth.This tells him that the market is definitely softening.

Find another way to lower the amount of expenses that you're spending (i.e. solar panels, cheaper insurance provider, real estate friendly CPA, etc.) to offset what is coming out of your pocket.  

If you can do that instead, unit A is paying directly way earlier.Around here going from 2 units to 3 units on a given meter would likely require a new entrance cable and shutoff or breaker panel, unless that meter has a lot of unused amperage. 

Why not just ditch the boiler and upgrade your panel and have an electric furnace installed? 

The main fuse/breaker panel has probably been replaced since the house was built, but don't assume that the wiring has been replaced just because the panel is new.