Like @Alan Asriants and @Matthew Paul said location, location, location, an area during the day and night are very different things in Philadelphia.While the cashflow might be great, the greater the risk the greater the reward, but there are still plenty of other areas where you can get 200-400/month without being near the largest open air drug market on the east coast.

Like with any rental, tenant screening is crucial in this area because opioids and other drugs have hit the area hard. 2019 has been my first year without an eviction so it has been a learning process.

From the article -"Have had enough of dodging gangs of violent drug addicts just to get in and out of the building," Musk posted.

I know which tenant is causing the problem (although might be difficult to prove it’s one tenant over another), and I know I cannot evict for illegal drug use because weed is legal in Ohio, so I am looking for other remedies.

There will be red flags that jump out at you...obvious drugs, poor/no work history, etc3.

Are any of the renters problem renters, such as drug dealers, or super annoying renters such as someone who plays loud music at full blast all day long - or hangs out Windows screaming at the neighbors - to the annoyance of the other renters you have.

This is just an international diversification play, and I will tell you that the coffee market has some very interesting and compelling dynamics, vice always sells and caffeine is a legal drug.  

Most fights last under 20 seconds and contrary to the movies one to two properly placed strikes can take someone out unless they are hyped up on drugs or other stimulants.

If they spent ten years in prison for drug dealing, but have been out for ten years, have been sober, stayed employed, and paid their bills, there's really no risk associated with their criminal past. 

Monday (Memorial day) Tenant texts me at 8am asking what the plan is for the mailbox key saying he has a prescription coming and he really needs it.