You had stressed the main point of doing a 15 is getting it paid off and all that extra will be cash flow. If you really break it down, (PITI), you'll hardly see that extra little bit in cash flow making a difference. Let's say you have a $500 mortgage, the property rents for $850, and you do that 4 more times (20-25% down) with the money you would have paid off the first property with. Now, you essentially have (with the same numbers) $1400 extra in cash flow each month. Trust me, I drank the Dave Ramsey kool-aid, and I always thought how you could just snow ball this baby once you get a couple paid off. Truth is, I don't really have the patience for that. RDPD, or The Millionaire Real Estate Investor are both good books that will shed some light on this. I have 4 rentals, all with conventional 3-5% down loans. In 20 years, my payments will still be the same (aside from taxes). Take advantage of the interest rates. I'm no economist, but who's to say the 80's couldn't happen again. In that case, you won't need to even worry about cash flow. Good luck to you. Keep in mind, I'm just one guy. Ultimately, you have to do whatever makes you sleep better at night. I've tossed around ideas and spreadsheets until I'm blue in the face about all the different scenarios. Just keep thinking, and kudos to you for asking questions.