The 1% properties have had slower rent growth, higher turnover and eviction rate (major profit killer), and less appreciation.

There are definitely deals to be had in both these markets and the growth happening in these areas is exponential, right now.

In your opinion, what is the strategy most likely to make your business explode in growth in the next few years?

Finally, it’s pretty well accepted that jobs and population growth go hand-in-hand.

Now with time and rent growth, what could be a negative cash flow property might very well become a cash flow king, but that takes patience.Another way to increase cash flow would be renting out rooms in the unit you live in, either Airbnb or longer term.When I’m analyzing the numbers on a house hack I go through this progression.

Any particular areas I should look into as far as population and job growth.

Both take in hard cash, don't use your leverage, offer returns in growth and/or income.

You may want to look at population growth, employment rates, and trajectory plans from the city. 

Is there potential for rent growth or appreciation?

As long as there is sufficient cash flow and you maintain reserve capital, leverage can be a great tool that allows for exponential growth.