Being less than fully compliant will quickly and possibly substantially dwarf that annual savings of $600.

Consider hiring a consumer reporting agency that specializes in background checks that way your background checks are FCRA compliant and all legal requirements are met. 

I’ve had many long term tenants that are very compliant all of a sudden when we announce substantial rent increases, that even five short years ago nobody could’ve fathomed.  

For example, we went through about a dozen cleaning outfits before settling on the one they use now.Also, pm companies have infrastructure like leases compliant with the latest state regulations, eviction processes, tenant screening infrastructure, marketing and showing mechanisms, and most of all experience with the local tenant pool.  

Do it by the book, and if your lease is compliant with local laws, then follow your lease - stop making exceptions to the lease and thinking you are being nice.

But I would not hang my hat on that one.. better to just skip those or be compliant.

Im assuming your not counting making sure the place is legally compliant.  

The lot (just over 1600sqft) is not compliant by current Boston zoning standards for development but there are certainly "skinny-mini" townhouses that have been grandfathered into the system.  

I've been off and on trying to add my NMLS # to my signature so I can be all compliant and whatnot, and the interface where you add it looks very simple, but it never seems to 'stick' when I add it.I've tried every "what if I click on this thing?"

I recommend buying a copy of whatever code is used in your area.If all this work was done some time ago it may not be fully compliant with current codes.A good place to start is a discussion with the planning and zoning commission.