and my Grandfather had a hardware store in Chelan back in the day he provided pots pans and utensils for the workers at the Grand Coulee Dam.

(Talk to a lawyer)5) We charge 20%, or as low as 15% for large clients - we call this a "preferred rate."6) We use RemoteLock hardware and software; at our scale the other brands like Schlage and August start to glitch and are quite unreliable. 7) Those suck.

First job-cross off anything that is not in the plan.Design and PlanningPermits and InspectionsDemolition and DisposalFraming and General CarpentryElectrical WorkPlumbingHVACInsulationDrywall and FinishingPaintingFlooringCeiling InstallationInterior DoorsTrim and Finish CarpentryLighting FixturesBathroom FixturesKitchenette/Cabinetry (if applicable)Countertops (if applicable)Appliances (if applicable)Hardware and FixturesBuilt-Ins and Custom DetailsCleanup and Final TouchesContingency (for unexpected costs) --

Leveled house- exterior paint, fresh landscaping, added privacy fence, interior paint, new windows, new mini split heat pump system, painted kitchen cabinets, new counters and hardware, new bathroom vanities and toilets, expoxied baby blue bathtub and tile surround white.

Our rentals are in lower-income areas as well (D-C) but we try to do the little things like having flat light switches and stainless steel or nickel-plated hardware.

I also thought of using google wallet.  

Each sits in a large pan, though not the cheap ones you can pick up at the hardware store.

Spend your time walking your local Home Depot or Lowes or Ace Hardware.

I am assisting someone who owns a hardware store in NC  It is housed on property she owns. 

If it doesn't add income to your wallet after the expenses do not take the time and money to do it.