Congrats! We paid off our ...GASP... 3.25% mortgage earlier this year. Sure, we could have made a bit of money otherwise investing those funds, but we're now putting $2500/mo automatically into VTSAX. On top of that, the feeling of having VERY LOW minimum spending needs per month is very freeing. It put us in the situation where we could theoretically live off of my DW's 18 hr/week part time job if we needed/wanted to.