How about vacancy factor in Riverside.Seeing both Houston and Riverside have historically appreciated faster than inflation, you methodology would likely still work if they can handle a short term of negative cash flow. 

One tenant is a family of 5 in a 4 bed and one tenant is a single person in a 2 bed.Appreciate any methodology that has worked for anyone with a similar situation?

Your best argument may be that "market rate" is too indefinite to be enforceable as there is (apparently) no methodology provided for in the contract for determining "market rate."

All that list and e-mail BS, it's ancient history my friend.

Renovations by owner-occupants of single-family residences.So I understand those above two points to mean that I don't need to involve any further professionals and I can proceed to carefully take care of this on my own (I'm in the process of educating myself on proper abatement methodology).Anything else I should know?

Make sure it is an engineering-based study which is the IRS' preferred methodology.

I have no idea what their methodology is, but generally speaking it looks reasonable to me! 

Just an FYI - We are presenting on the BRRRR methodology / topic this coming next monthly meetup.

For details on our data sources and how we put all the information together to create our final rankings, read the Data and Methodology section below.2.

We are building a portfolio of rentals and I am looking for a strategic methodology that can be applied to all new rentals that covers everything that is addressed prior to tenancy.