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You are waiting on a Pre-Approval through WF? This is normally a quick process. It can be done over the phone or in person. I'm curious why you haven't been told anything yet.
I think that this is the beginning of your house buying adventure. I like the idea of a Mortgage Broker because with my experience it was such a personal relationship. Everything was explained to me in detail and even when I felt the road was rough she stated, "Let me worry about it, that is what I am here for." Manual Underwriting doesn't mean No, I can't wait until you post Clear to Close.