<p>If you decide to go "old school" and get a 30 year on a $405K loan at 6.25%, that is $2500, plus $200 a month in down payment opportunity cost. Plus the $1000 Tax/Mello/HOA gets us to $3700/month.</p>
<p>So yes, this is not quite double, even before tax breaks. But it's in the ballpark, so...