If something were to happen to me, she is obviously covered.

@Nancy ZhaoWhile heat-pumps (either air to air or air to water) are wonderful  - we use them quite extensively - those of us in climates which experience *real* winter are normally required to have an ancillary source of heat to cover those periods where the heat pump alone is inadequate.  

I'll be cash flowing enough to replace my income in about a year(or at the very least enough to cover my burn), and I want to 'retire' and go full time investing/flipping/hustling side businesses.

The guy shovels snow because snow removal is not covered in the lease and he doesn't want to trudge through snow to get into his house.

If they have to pay an agent to sell this property and the buyer agent as well then the $15,000 margin might not even be enough to cover that (4% commission is $17,000).

If you're wiling to suffer through, then you have those benefits at the end of the day, and at least you have your foot in the door of real estate. 

My personal formula for critical mass is: My lifestyle overhead (variable for everyone) + 1 SFH deal per month = Critical MassThis basically means, if I can cover all my expenses and planned expenses in life & have the OPTION to buy 1 SFH home per month, I would consider that critical mass for myself.What is your personal formula?

And I would rather have more doors, so if my one tenant moves out there are others to cover the bills.   

HOA covers all outdoor maintenance (roof, yard, siding, trash) HVAC was replaced in the last 5 years.

Make sure numbers work and rainy days are covered.