I currently have 2 rental properties, looking to buy a 3rd. One is completely paid off and the other has a loan balance of around 49k. It is financed at 4.625%, and I was thinking of funneling all the rental income into the mortgage to pay it off aggressively. Is this a smart thing to do at 4.625%? The idea would be to buy a 3rd property soon and add that income to the payoff. When the 2nd house is paid then start attacking the 3rd, which will likely be financed around the same interest rate. I have a hard time deciding if this is a good strategy or if I am better off saving the rental income for more properties.