Keep It Simple Stupid (KISS)
If you want to know how important the numbers are when investing in real estate, it is similar to the analogy people use when working out. 90% is about your diet, the other 10% is about actually working out. With investing in real estate, I'd say it's very similar, 90% is about the numbers, and 10% is the rest. Once you know how to analyze a property, to determine if it will produce a good return on your investment, produce a good cash on cash return, have a short payback per