I also discovered the old HW tank was running off a 30amp double pole at the panel with a 20amp double pole shutoff buried in the HW tank closet behind the tank???.

What I didn't know was the panel is a recall and needs to be replaced.

A few interesting revenue sources I've found:-Selling tideland rights - locally we have great shellfish, and you can sell *just* the tideland right to large seafood companies, while keeping the use of the property-Selling timber - I found out a local investor just buys vacant lots, logs them, then resells, with all the money in the timber-Selling energy - in some cities, if you have solar panels, you can sell excess energy created back to the cityWhat other creative alternates have you found for getting more money from a property?

We have it with a coded deadbolt so the PM can get into the garage if there's ever an issue with the water heater or electric panel, and could provide that info to a guest in an emergency if necessary. 

I initially paid for repair but the repair job was not good at all - this was a lazy Susan cabinet door, the repairman tried to bond the two panels but there's so much gap between the two panels and paint has chipped, they're so ugly. 

Installing solar panels could generate more passive income, but it wouldn't come directly from tenants

Heat and water are the only bills and the land lord electric panel is 35 a month.

By the way, if you to spend a little extra, those interior doors can be replaced with 6 panel doors (like the front door, but hollow) for about $50 each from Home Depot or Lowes. 

About $600 per unitOther miscellaneous expenses: drywall, 2x4s, trim, framed mirrors, caulking, sandpaper, screws, finish nails, various tools, etc.Oh and fence panels & materials $1400 total for all units; we deducted a total of $750 from the first new tenants rent over a period of 3 months to install it.Well that's my story, I would love to hear from others who have similar goals and experiences.  

It's possible you mis-interpreted what your agent meant when they said you could renegotiate after inspection (usually that means for major issues like dangerous electrical panels, structural issues, partially collapsed cast iron sewer line, etc. that weren't obvious at the initial showings, not superficial things like "the AC is rusty" or "we should replace those ugly fans").