They've made some positive changes in regards to credit hits while pre-qualifying for a home.
It used to count as a negative hit each and every time someone pulled your credit. Recently they've changed it similarly to follow the car PQ's and student loans where you can pull it as many times as you want in a 14 day period and it counts as 1 credit hit.
I have very good lenders if you need a 2nd opinion/prequalification. I know a really good Realtor if you need one as well. :-P... more