Spend some time - find some mentors - buy a few coffees and get really comfortable that you know all of the hidden dangers to the investment you want to make and then, pull the trigger.  

It seems that I am spend so much time with people I would not accept because they will drive me nuts! 

Like I have seen in my country the youth are willing to spend their money on buying property than the older generation because they're more educated.

Spending even one minute stressing about this kind of thing isn’t worth it.

Zillow rent estimate shows this place at $850/month.Someone will buy the house and spend $15K to fix up the place.

Look for a better property, even if you need to spend a few bucks more.

If your applicant isn't willing to spend that money, they are either unqualified or not very interested. 

The taxes are high, but there are options that will work, depending on how much you can spend and where you are and where you want to invest.

I work as a financial advisor and spend most of my time with clients.

In general I would say that if you are comfortable with bookkeeping, do a good job screening, you have a property in good condition, and you take the time to properly educate your tenant on communication and maintenance procedures, expectations of both parties, and responsibilities, you'll have no problem self managing 1 duplex on your own with very little time dedication.Typically you will probably spend 15-20 min a month on bookkeeping and entering transactions, and that is about it.