[Keen]

Good call PP!

You can also think about it this way-
...on a $230k 30yr Mortgage @ 6% by making a one time pmt to principal of $29k during the 17th month of the note would save you close to $100k in interest by the end of the term (and therefore it would pay off around 6.5 years early)

Now you may sell that townhome and move long before that, but either way I think it is a sound move with only upside.

As long as you still have a little cushion left in for an Emergency fund as Sweeps states.

This is not even factoring in the issue of the PMI...that is just the icing!