Obsessed with the Numbers

[John K.]

I spend a lot of time analyzing numbers on my properties, and I typically compare all my expenses as a % against total income for each property. So for round numbers, if I had 30k in income on a duplex, and I spend 5k on taxes, taxes would be 16.6% of income. I then compare all my properties on percentages instead of the actual dollar figures since then it is an even playing field.

Does anyone have any pro-tips for ways to compare properties and analyse their numbers in depth?