It was a real money maker and cash flowed, even at the full sale price, about $400 per month.I had only been selling real estate for three years at that point and told my wife that we should buy the house.  

We have been at it for about three years, and though we have mostly established our basic screening criteria, we keep running in to new situations.  

You have a three (3) year window from the date that you moved out during which you will still qualify for the tax-free exclusion under Section 121. 

The vast majority of our work for the last three years has been mid and high-rise apartments (up to 400 units), along with a secondary sector of hotels.  

This is known as the self-sufficiency rule.

My friend has just bought a newly built house in a nice area for $270k, sitting them for three months now not rented .

This is known as the self-sufficiency rule.

I have been educating myself now for the last three and half months on wholesaling down here in Miami.

Out of the three ways to get into real estate investing I listed above(house hacking, live in your flip, or wholesales) which is the best strategy to get started?

Looks like the electricial wiring is original two cloth-insulated wires, although the kitchen and bathroom have three-prong GFI outlets.