But because they cost so much time/money to write, I've started strictly verifying the addresses first.

You can still rent a property people wouldn’t want to live in, but you’ll pay for it every cycle through lower rent, higher churn, or more management effort.Would a normal, stable tenant feel proud giving someone their address?

Once you have some addresses, you can send a letter or postcard.

I keep copies of receipts in a folder for the current tax year-I write the property address on them and keep them together by property.

A little slope is probably okay, just make sure to address any structural concerns or weaknesses.This is more my opinion, but how much slope matters a lot too of course.

I want to bring Unit A up to $940 to match Unit B’s base rate.The Risk:The building has deferred maintenance (siding and roof issues) that no immediate attention needed but they are heading to the end of their useable life and I’m planning to address "as I go" since everything is currently functional.

Drive one day, collect 20-30 addresses, then run all your skip traces at once instead of one-by-one.

The property spans two streets and has dual addresses for the house and garage. 

The inspector has limited knowledge on circuit panels, grounding and does not want to get sued being wrong.You can eMail to the contractors and start asking them what you want to address. 

Like many rookies, I drive around and jot down addresses of houses that look distressed, scroll Airbnb and check out properties, research neighborhoods online, and have about 100 saved properties on redfin and zillow.