A rental property currently generating $2000/month rent and $2000/month expenses (including a fixed $1000 mortgage) is predicted to generate $1890/month cash flow in 30 years, assuming rents keep pace with inflation.
"Well, if you just extrapolate the rate of inflation on that $2,000 per month in rent that you're generating today, your income would balloon to $5,780 per month... But that mortgage payment that was $1,000 today, 30 years from now is still $1,000... making your cash flow $1,890 per month. So, you've gone from a break even situation to a almost $2,000 per month cash flow even if rents only keep pace with inflation."