As I understand we need to define strategic goal first and next step is to choose the business model which is comfortable for us and supports strategic goal and afterwords to creat a business plan.

CFPB has laid out a plan to allow balloons for creditor that meet certain criteria, and only to allow them for a short period of time (in case creditors revolved their business around Balloons, they now have a short period of time to change their model).

I am sure the manufacturer has data on how many "hours" the units can run depending on model.

There is a beautiful, well originally going to be, neighborhood that was built out and has model homes built in a community.  

People have been successful with different models.

I've been fortunate that as I've grown, both as a person and an investor, there have always been role models and mentors along the way.

I use bandit signs in my area as a main marketing tool for my model and I have a sign making/placing policy put in place that is so easy to understand a fifth grader could run with it.

This is a model I'd like to start exploring. 

I’m a numbers guy and I create models/projections of where I will be in X amount of years given certain assumptions.

I have my bachelor's in finance and I am the type of guy who is very analytical, number oriented, keep my life in an excel spreadsheet, and I was looking for a resource/book that would teach all of the pertinent calculations and financial modeling tools necessary to make good decisions in RE investing.