While I'm aware that Pit Bulls (and Rottweilers and Dobermans and other restricted breeds) can be and usually are very sweet dogs and good pets. 

I have signed up for Buyers on Fire (back-office management program with sweet spot locator, lead capture numbers, pipeline management, and comps calculator.)

You should do some research to see where the sweet spot is in your area. 

70-80->115 in a year sure sounds sweet :)i can understand what you are saying, long term hold without a loan, but why not try to find a deal where you can profit from both a rise in the house price and the rent?

In order to make it in today's market you'd definititely need to "buy some cashflow" (higher downpayment) targetting  the right SFH that sits dead center in the sweet spot that families are looking for. 

Sweet spot seems to be 40-80 units.

Here are some words from our Sweet Home Chicago.

Short and sweet. 

To this point we've focused on X number of doors to get to a specific cash flow number in order for me to have the option of walking away from my W-2... specific challenges have just been*finding that sweet spot of property and location and getting the bad inherited tenants out *getting improvements done that needs to be done.

Tad bit annoying but on the other token often times they are sweet and nice then other times we have bumped heads.