Wow, that's a lot of numbers. I wanted to do something similar to that but decided it would be a good idea to build an emergency fund and possibly pay the car off first since that would take much less time and money and I could apply the car payment to the house afterward.
This is a good move and what we are planning too. The loan on the car isn't much, but it will add a large amount to this period of time with the collar, so knocking that out and paying it in will speed our process.