These are professionals with additional training and a stricter code of ethics.

And if you make it a quid pro quo, don't you run the risk of violating the OTA's policy of paying to alter reviews? 

Renting a garden unit, for instance, could generate $1,200/month but must comply with city codes to avoid fines.4.

It's an endless game.Recently, one of the tenants being evicted reported a broken heater to code enforcement and the Department of Children and Families (DCF).

I think there is a way to do it by zip code but that's not really granular enough.

Avoid any self-help eviction tactics like changing locks.Maintenance: As a landlord, you’re responsible for ensuring the property meets basic health and safety standards, including working plumbing, heating, and electrical systems.Inspections: While there are no mandatory inspections required before renting, your property should comply with building codes.

There are some zip codes where you can indeed get above market rent with S8 (even after deducting utility allowance), but some where they are lower.

Would definitely check local zoning / code enforcement laws as well.  

The issues really happen when it's just R.E. agents begging for some $, pitching "I can do that too" and in reality there in breach of NAR codes because they don't have proficiency and expertise in it what so ever.

Is there a way to find local developers based on zip codes on this forum?