That sounds like a very exciting chapter of several lives!!
Interesting that here an individual goes and gets "pre-qualified" for a loan before ever looking at a house (or they should). In the extremely fast moving real estate market here in California buyers need every advantage they can get. Pre-qualification lets the seller know that a buyer can, in the eyes of the bank, afford the house they are bidding on. It also shortens the time it takes to get an actual loan.
Hope all goes well!