From a process and procedure perspective, does your process have an allowance for this type of accommodation to some tenants and not others?

The letter would introduce me, the updated rate ($50-$100 increase depending on rate), and a brief explanation of my policies and procedures.

Assuming that all the proper documentation and procedures can be hashed out ahead of time, it still doesn't seem to be much skin left in the game for this to be a truly solid Sub-2 deal.   

My step mom is a massage therapist and she wants to open her own business. 

Hi gang.  Just starting out and have done about a dozen property analyses using the Rental Calculator tool. The BP calculator lets you save the results which is great, and I know you can set Reminders.  But now that I...

Be ready to start eviction procedures as soon lawfully possible if rent is late.

Like massages? 

BTW, I do receive zoning board meeting notices from the town when neighbors file for variances, so you can't do it in secret.I don't know the procedures and politics in your area, but I described what will happen where I am.BTW checking who are family members is not a violation.

They must be very qualified, licensed, insured, bonded, good with documents and a very procedural bank.

Hiring people, procedures, systems, etc.