Also had a great support staff.  

I may want to consult a local lawyer anyway to confirm it and explore other options such as building an addition (perhaps a carriage house). you know in most cities you simply walk into the planning department and talk with a planner and have them walk you through the zoning codes and there will be clear cut language what is allowed out right and what takes a use permit at staff level and what needs to go to the planning commission etc.   

There is no way that a tenant having a guest who has a criminal record comes remotely close to violating this provision.There is also this language on fraternization:"There shall be no fraternization or private relationship of staff with inmates, parolees, or members of their families.

Adrian Stamer If you have a responsible/honest/inexpensive/timely handyman on your staff then I would definitely consider expanding your business. 

The staff is very limited and will take on the clear as day cases to allot their time properly.

I have a certified property manager on staff and can get her to make sure what the current laws and letters needed for this.

Is abusive to the property management staff requiring constant communication and taking the attitude "Don't you know who I am?".

My undergrad was in biochemistry and now I am pursing Master in Bioscience which will put me into business world of pharmaceutical/biotech companies ( I wont do any bench chemistry lab work). 

There are so many fantastic resources...and you can find a tutorial on pretty much anything on YouTube.That knowledge is critical during discussions with trades folk, Home Depot staff, and protecting yourself/your business from scammers.

How much revenue do you think it will take to pay all that staff you're planning?