On these quarterly visits we check the HVAC and change furnace filters, check the smoke/CO alarms, check plumbing, and add other tasks as needed.

The tenant upstairs fell asleep smoking and burnt the place down.

***I KNOW one tenant defiantly smokes the green and I know another pays cash (never timely) and I feel like I'd have to flush everyone out and find all new tenants.

A vacant unit doesn't cause drama, bury you in requests, wreck things, have the police over, do drugs, smoke, sneak in pets, cause you indigestion, etc.  

Real estate is just another problem for us to figure out.On the flip side we tend to be more introverted and small-c conservative than sales and marketing types, so we struggle with those parts of the business.I think you also get to a point in engineering where you have to decide whether to stay on a technical path or go over to the pointy-haired dark-side of management.

I have failed an inspection because the tenant didn't keep the drip pans clean.You might try and make them responsible for testing and replacing smoke detector batteries also, but not sure if that one would hold up.AC filters are normal for any property.

Should have a photo feature, so for example I’d take a photo of the plumbing under the sink, smoke detectors etc and mark them OK as of that date.

So your distant uncle/mentor/employer smoked you on the price.Because you trusted him, because you were young.Have you ever talked to him about this?

Even if a dark space and tenant still paying rent there are usually new tenants that want those spaces to own directly or lease out.NNN is in big demand but buyers with lots of cash sitting around.Maybe if you look for 1 year and many thousands of properties you might find one but do not expect a NNN broker to work on a Unicorn like that.

Non-smoking unit, not any longer.