Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

Real Estate is still a get rich slow game no matter what the internet tells you.

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

Play the long game but realize that maximizing long term net worth has to stop if you want to be financially independent.3.

I use Focusmate to co-work with others online. 

What is your game plan in terms of surviving and paying off the rest of the 60% of the mortgage?

For you to be in the game 2 years Im impressed and see you are headed to much bigger things.

This is because so much new multi family supply has come online.

It may be a difficult game to get into in 20 years, yet many will find a way and the cycle will continue, so long as the US is still standing.Ultimately, none of us has a crystal ball, we can only look at history.Conversations like these have been going on since the dawn of man and will continue. 

@Arron Paulino you can find some great information online (youtube) from Pace Morby on this subject.