Anywhere that has consistent or slightly growing population and a decent job supply may be a good fit.

This will influence the supply in the area but in some specific niche or criteria, that's why is important to review constantly the area -inflow of new families are not slowing down.

There's a lot you can do remotely such as listing on websites, pricing strategies, arranging/order supplies, guest communications, going to the property and doing work on it (note: travel time generally doesn't count).

Finally, The rent control discourages further development, limiting supply which results in higher rents.So rents go up, but the rent control advocates are too uneducated on the economics of the rent control policy to see their role in the rent increase.Another consequence of rent control is no value in keeping the property as nice.

There could be a "double whammy", a recession (which we seem overdue for) then a drop in interest rates which leads to a big influx of new housing supply. 

I guess my challenge right now is to define the strategy and balance all the factors, such as job and population growth (value increase), cashflow (demand & supply market, interest rate, property tax, maintenance cost), and risk control (insurance etc). 

As to others points rents will change with supply conditions.

Though I have not personally contributed to these investments for tax credits, I have personally seen these investments in action and these investments can help provide more supply of housing and development that would otherwise not be there.

We supply kitchen appliances for all of our units, on the SFR's we supply dishwashers because they are in nicer neighborhoods where a tenant would expect it.  

Construction is mainly CMU, Concrete, and Steel (at least for my projects), and there is a bottle neck of those resources as only few supply the area.