This has historically been Real Estate, but with large swaths of  CRE being seen as undesirable at the moment, much will continue to be  pushed into residential.

I check on realtor.com and Zillow but again a lot of properties in undesirable locations.

How funny that Turtle Creek in Houston (at least when I lived there) was kind of an undesirable part of town and ritzy in Dallas, and same for River Oaks ritzy Houston and much more modest Dallas!

Unless you are in a highly undesirable area, you should have plenty of options for people looking to rent.

This reduces the risk of undesired activities.

Even in areas which are undesirable, a lot of money has been chasing yield.

Land value increases over time unless the land is in an undesirable location. 

The tenants tend to be responsible, whereas if you have a unit where the streets are unkempt, the surrounding properties are unmaintained, and undesirable tenants gravitate, I err toward shorter leases for the reasons stated above.

As long as the area isn't super depressed and undesirable, renovating it nicely will bump your rents up.

The key point from all these responses seems to be that PMs are overrated and represent risk, and that profit for them is a question mark, which raises the likelihood they'll do something undesirable with your tenants/properties.