There are two main factors that you can use to track gentrification, so why can't they be used to track the reverse?

This is bad math, once most people factor in their income tax bracket. 

The discipline to run on a budget for a number of years or decades depending on your math, doesn't factor in emergencies or market changes where the HELOC could be used to invest in other places.

You can do some really cool, unique, and creative designs with containers.Do seniors want to build/buy in a rural area vs city area? 

I could be wrong due to glancing and it is only noted here as some investors may evaluate deals with that as a factor.

How much will depend on how well their processes are designed.

Obviously, two factors are responsible for what will likely be more than doubling our money in 3 years.  1.

. #1 is the primary reason, but #2 does factor in as well.

Yes, I use Zillow reporting as a start and look at other factors.

The only thing that I see missing if they are purchasing with hard money debt they may want to factor in 3% - 5% for closing costs (points, fees, title, etc) Thx Zachary!