(dictated but not read or corrected for spelling and grammar.  

Simply allowing the market to dictate which property managers grow and prosper and which do not isn’t sufficient. 

Your lease dictates the amount of time needed to end a month to month tenancy as well as how much notice is required for renewal.

If i understand you are saying markets dictate what you can do for the most part.

Permittable bedroom count is going to dictate your max occupancy load per the myriad of local regulations.

Supply/demand dictates housing will continue to be expensive in these markets for quite a few years.  

Posters will chime in on recommended strategy but real estate is extremely localized and the fundamentals of the real estate in any given market are what should be dictating your investment strategy not arbitrarily deciding to buy single family homes vs. duplexes. 

I say take a deep breath, step back, have a drink, chill-out, then approach the situation in a way to answer everything with MATH. use math, data, details to say how good or bad each property is, and to dictate what direction should be. 

The more deals you work through, the more people you talk to,  the more questions you ask, and the more options you can create to meet the seller's needs (also meet your needs as a buyer) will ultimately dictate how many houses you buy per year.

I am paid right around the what the market dictates for a construction project engineer with 3 years experience in NYC, maybe a little higher given all the perks and bonuses.On the expense side, I bought a used economy car instead of new.