Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is this comparison of a 15-year vs. a 30-year mortgage reasonable?
I think your analysis is very clear, it's a sensible approach, and the numbers sound about right to me. A few other things you might want to think about: Tax In some jurisdictions you can deduct mortgage interest against your income tax. I see from your profile that you're in Texas, but I don't know the exact situation there and I think it's better to keep this answer general anyway. If that's the case for you, then you should re-run your numbers taking that into account. You may also be able to make your investments tax-advantaged, for example if you save them in a retirement account. You'll need to apply the appropriate limits for your specific situation and take an educated guess as to how that might change over the next 30 years. Liquidity The money you're not spending on your mortgage is money that's available to you for other spending or emergencies - i.e. even though your default assumption is to invest it and that's a sensible way to compare with the mortgage, you might still place some extra value on having more free access to it. Overpayments Would you have the option to pay extra on the mortgage? That's another way of "investing" your money that gets you a guaranteed return of the mortgage rate. You might want to consider if you'd want to send some of your excess money that way.