Data over the last century shoes REITs have a correlation to stock market returns. 

For example, replacing a simple roof of 11000sqft home will be much different then complex roof on 2,800sqft home.

@Jeff NashI fully agree with you.Permanent Life Insurance is a complex product that has many advantages.

Consider different selling options (traditional sale, rental, or auction) based on market conditions.Tools that may help: QuickBooks for budgeting and expense tracking.Zillow or Redfin for real-time market data Asana or Trello to track the progress 

We build our models in excel and try not to over complicate them (even though ours is pretty complex).

Where specifically do you look for these trends and market data? 

Apparently, you are "highly encouraged" to live at a certain apartment complex.

The data should be transparent so you can verify what supporting data was pulled.If you worked with our brokerage. 

I have partial ownership of an apartment complex with several people.

They have the best data of exactly how things will come out in the wash vs an agent who's focus is getting you to buy something.