And while nothing is foolproof the most consistent method of finding good vendors is relying on OTHER real estate investors that have worked with those vendors. 

House hacking is the best tried-and-true method for new investors in my opinion.

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

Since you aren't looking at the BRRR method, I am assuming you want something that is turnkey.

What other methods should I use to acquire another property? 

BRRRR method is also a great way to go - good luck!  

Right now, the majority of lenders are hitting DSCR loans hard, which is a strong indicator that the BRRRR method is still going strong, even in a higher-rate environment.We always say, “Date the rate, marry the property,” meaning interest rates will fluctuate, but the right deal will always make sense long-term.

What's the highest success percentage method to find a previous tenant's new address for this? 

I've been using the BRRRR method more recently with some success.

@Treza Edwards "I am reading the Rental Property Investing book and implementing the method that focuses on cash flow and that strategy states you need to have $300 cash flow per month, per property.