In all those jobs, practice your Spanish as much as you can. 

Practice your pitch!

A few more practical things to think about:1.

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

You are overestimating these numbers.Speculations as to why: tenants in these particular rentals may be tolerating a lower standard of maintenance than you think and thus everything wears longer than you think it will, I may have a different relationship with my maintenance people than you do (actually I don't let my management company do anything and I'm very involved in maintenance, I know how to do practically every necessary task, I manage people directly and sometimes I'll do a few things), there may be an error in your calculations such as you're assuming two units in a duplex don't share as much as they really do (they still share roofs, yards, and many other things), or something else entirely.Either way, your numbers are way too high and I will not be able to answer why in more detail or provide you with my exact numbers without spending a significant amount of time on this. 25% ain't too far off. 

4.What are some best practices for managing multiple rental properties?

Hi, everyone; I'm looking for some general advice and resources on best practices for managing a property for someone else. 

It is Oligopoly at best.      2, Apple's questionable business practices.

Any tips, experiences, or best practices you can share would be greatly appreciated!

How is that good business practice?