What zoning code could I request a zoning variance or rezoning that would allow us to have the 2 livable units on parcel, one primary residence and one additional living unit (known currently as ADU)?

Quote from @Aaron Kuehmichel: When the tenant requests an improvement, it's OK to say no.

At the completion of your due diligence, you have 3 choices; accept the property as-is and move to step 4, reject the property and walk away, or ask the Seller to correct any items that you request. 

@Chris Magistrado,Legitimate buyers might request an inspection for due diligence.

You can simply request a separate check for the $100 increase to bring the total deposit in line with the new rent amount.

We completed our due diligence within 10days and once the report came back, we immediately requested our deposit back. 

Also requesting a copy if possible.

However, when I requested our EIN the letter stated, "Based on the information received from you or your representative, you must file the following forms by the dates shown.

I have two tenants on a 1 year lease. They recently split up and the wife is asking to be removed from the lease agreement. I am considering doing this but should I charge a fee to write up and get the lease addendum ...

Here's a list of things to track:- Formal lease application- Formal signed and executed lease specific to your state- Payment history (I recommend using online rent collection like Apartments.com, RentRedi, etc)- Maintenance requests and receipts- Accounting for all rental-related expenses (repairs, utilities, etc) The more you treat it like a business, the more helpful you are to your CPA come tax time.