From there I look at deals followed by the areas they are in.  I

As for looking for a PM firm once you determine what market you want to invest in I would look up NARPM and start with them..Below are some questions I would think would be a good starting point for you to see who really treats their company like a business or a hobby.

@Jay Garrison what neighborhood are you in? I

As far as calculating interest, it's not difficult to do it on a calculator but you can just go online and find dozens of sites that can do it in just 1 minute.

@Eric Creager I have 2 rentals and have not needed these services yet. turbo tax, personal ownership and a vetted online lease are adequate when starting out. as you grow your business that may change.

You can also check their reviews online at Google, Facebook, or Yelp.

@Adrian Fajardo - make no mistake about it, the saying "you make your money coming in" is 100% true.  

@Ahmed Sublaban  Yeah you won't be able to get it online from the San Joaquin County Assessor's Office. 

I tried to look online and couldn't find any, but I couldn't find a good website to find one (I'll keep looking).

And it never hurts to go travel and see their operation and the areas they are investing in. I