Rental calculator VS learning your market with a spreadsheet

[Nicholas R Paust]

I'm just wondering from seasoned investors on what's your go to method for analyzing a property.  I'm currently looking for my second property and feel maybe I just got lucky on my first property since I didn't run any numbers.  My first investment was a turn key property that cost $124,500 I put 20% down and rents for $1550. I see people talking about the 1% rule, as well as the bigger pockets calculator.   I also listen to Mike Zuber author of one rental at a time talk about learning your market which is a course he has that includes a spreadsheet that tracks sales so you know what's a good/great deal in the area of the investment.  Any thoughts on any of these or open to other suggestions.   I'm trying to turn this into a business for something that I can do every day.  Not just save up and do research when I have a down payment.  THANKS