@Bayo Badejo, there are so many missing pieces here to even begin to give a real answer.What insights are you wanting?  

When you own a couple of units, the odds of there being unexpected vacancies that overlap each other are usually low, but when you acquire more and more real estate, the odds of tenants moving out around similar times increases. 

It’s crucial to consult a real estate attorney and tax advisor to structure the transfer in a way that minimizes tax consequences and aligns with your objectives.

Rarely is the complaint the real problem.

At that time, my friend encouraged me to get into real estate with the idea of creating passive income and wealth in future (via appreciation).

Looking for cash flow right now, enough that my wife is able to quit her 9-5 and join me full time in Real Estate/Investing.

Squatters are a real problem nationally and a study found that they target not only vacant properties but those advertised for rent or sale that offer 'immediate occupancy.' 

For several reasons (property taxes, politics), I would prefer to begin real estate investing somewhere other than locally. 

Jaron Walling said something that caught my attention, "search for and buy a bad roof, leverage it during the negotiation"....especially of the property has been sitting on the market longer than normal for the current market, a "bad roof" might be a gift from the real estate genie.My point is this: get good at estimating and fixing a bad roof (or any particular problem found with most houses that sit on the market longer) and you'll get comfortable buying/fixing properties that scare off other buyers. 

Dallas is a city with a lot of potential to invest in real estate.