That is, do I want to buy the notes whole, participate in a fractionalized note (if legal in your state), or invest in a mortgage pool?

Welcome to fractional reserve banking.So they pay you 10c interest per month but collect $5 per month in interest on the loan.

They will only pay a fraction of what they pay for your avoided usage, but they WILL buy it, it is required by law.I will exclude Mexico from this discussion because I have no idea nor care what goes on there.

It's a fraction of the cost of these 'gurus' and you actually get an education without an agenda. 

or fraction notes?  

The used appliances I buy are in good condition, look good, and cost a fraction of the cost of new.  

Will you be taking on investors and using their money to fund loans (i.e. arrange the loan and make a fee), arrange fractionalized loans, hypothecate loans you’ve made, perhaps start a mortgage pool, loan your own money, broker NPN's, or some other strategy?

You can analyze properties and run comps in a fraction of the time it takes trudging through the mls comps.  

But the small repairs never came to over $1,500 per building each year, could be a fraction of that DIY.

Try something like:"High end living at a fraction of the cost.