I always recommend using XY Planning Network's Find an Advisor Site (I see one who specializes in working with real estate professionals).https://www.xyplanningnetwork.com/consumer/find-advisor-new/?

Reach out to @Marina Draper, she specializes in real estate investors. 

Oh and then get rid of your license...It's so much easier to invest in real estate without all the self-imposed rules :) If you haven't signed anything with the seller saying you are acting in their interest, how do you have any special responsibility to them???

There are local law firms who specialize in creating these arrangements.

Of course, there is a possibility of making small concessions for long term tenants in a special circumstance, but that should be the exception not the norm.

@Ernes SahicA real estate broker that specializes in the particular multifamily property type has the systems in place to find off market deals if needed.

There are 20+ CPAs and accountants on this site that specialize in real estate taxation.

Also, when receiving rent, apply it to special charges and utilities first.

I suspect it's just a minor convenience and most tenants can handle it without any special accommodation.

Honestly I don't even know how I managed to get people who wanted to come back, it wasn't anything special.