sorry einreb but that's backwards main stream thinking. Dont do it.
The only people who should have a 25 or 30 year mortgage are the ones that are "just" getting into real estate and they can't qualify for the loan any other way than to take advantage of the lower monthly payment offered with these terms.
Start with a 15 year amortization and then go from there. How old will you be in 15 years? A few extra payments here and there and you can have that sucker paid off in 10 years. In 10 years the home will have appreciated too. You will be the KING of your castle!
Focus on the goal..... no mortgage in 10 years. SWEET!
From that point forward, you will have no mortgage on your home. If you want to do some investing, you can use a LOC; but only invest in things that pay huge dividends; like double your money.
Go talk to someone who is in the position YOU want to be in AND no one else! Share this with your wife and see how excited she gets!