There’s normally action items that can be implemented into your management process that are more effective. 

As someone who’s just getting started, I’m focusing on connecting with the right people and learning how to present opportunities effectively.

We use Propstream but I am looking for some added info that Propstream does not easily provide  @Sean OToole is the owner and he has built an incredible platform..

It's heavily dependent on the types of properties and the effectiveness your processes and systems.If you don't have systems and processes in place, you may struggle to manage 30 on your own.

But, for instance, I sent them a notice of rent increase effective February 1 and needed them to confirm that they have accepted the new payment terms through our electronic payment system, and even after repeated notices, they are not responding.

Quote from @Matt Weddon: Really what generated this question was a section from Brandon and Heather Turner's Management Book, which has been incredibly informative and helpful.

@Hamidou Keita I would recommend if duplexes are limited if you can get a 4-5 bedroom house and either rent by room for house hack or splitting a big house into 2 and adding a kitchenette and separate entrance as a more cost effective ROI option 

If you want to find out how much equity you have to see if that’s an option for you, connect with a real estate agent and ask for a professional equity assessment report (PEAR).Who knows, you may find out you have enough equity to buy your next place outright– and with today’s mortgage rates, not having to take out a home loan is pretty incredible.

In Portland for example we are not allowed to increase rent more than once in 12 months, and it must be less than 10% increase in "effective rent".

Your perspectives have been incredibly helpful as I navigated how to handle the situation.Here’s how I just responded to the tenant:I expressed sympathy for their situation and the loss of their pets.