For example, if you buy for $100k, you will need to document investing an additional $50k min in renovation or otherwise "improving" the property.  

Some interior designers offer packages or PDF type documents to assist in product selection and design.

If for instance the service life is 10 years and they are 5 years old, it seems reasonable to charge their security deposit 50% of the costs of replacing the damaged units.Here is the HUD Service Life list if you are interested:https://www.hud.gov/sites/documents/EUL_FOR_CNA_E_TOOL.PDF Good Luck! 

Everything has pictures and is documented.

The executor/fiduciary/guarantee is where the direct mail goes to.Step 6: Doing the actual direct mailOnce you get understand what you are doing, document each step and systematize it.

If they don't, do not close.7) Have a lawyer look over all closing documents.

Document everything when you have only one property.

Look for well-documented processes and continuous improvement evidence to identify potential bottlenecks.Market and Demand AnalysisUnderstand market conditions and future demand projections by analyzing market size, growth trends, and competitive landscape.

Disclosure - I’m “just a landlord” … but willing to chime in….the first question is - was this supplemental payment documented in writing?  

Some conditions that you have to document and be able to prove:1.