Original goal was to get a 15-year loan, use a biweekly payment plan to pay off house in 13.6 years.
New goal: 30-year loan, put saved money towards investments that will hopefully earn more.
Basically I am assuming 7% interest rate of return on investments (not unreasonable considering stock market history). I figure that with my new monthly payment of $933 for P&I I will need $160,000 to generate the $933 monthly payment. In other words, when I can save $160,000, I have effectively paid off my house for the remainder of my mortgage.
Used this neat calculator I found online:
http://www.mycalculators.com/ca/savecalcm.htmlThis basically shows that I would need to save an additional $600 per month to save $160,000 in 13.6 years. Since my new 30-year loan will save me almost $400 per month, I really just have to come up with an additional $200. My original loan I was looking to get would cost me an additional $196 per month over what I am paying now (but would pay off the mortgage in 13.6 years).
So this means that for an additional $4 per month, if my interest rate of 7% is attainable, I get the same effective payoff. Now, I know that tax deductions on interest and taxes on income throw wrenches into these calculations, but I think it is still great that I can get basically the same benefit either way. On top of that, if I run into any hard times I can more easily afford the lower payments without risking the loss of my house (or forcing myself to sell my house if it isn't a good time to do so). It also gives me more money options as far as other investments might go rather than forcing investment in my primary residence. On the downside, by the time the loan is paid off, my son will be older than I am now. While psychologically that seems to be a downer, mathematically it is the right thing to do.