That is a great bit of advice. The manufacturers do that crap on purpose....Congratulations you two, your new home looks super nice!
I lived in a trailer home for 10 years in a very nice trailer park. Mine had a fireplace and a sunken tub and I was very happy there.
If I could give you one word of advice, it would be to acquaint yourself with a local repairman and/or a hardware store that specializes in manufactured home needs because almost nothing is the same as a tradition house. From water fixtures, plumbing, doors, and windows, everything was different in some way.
P.S. Find out where your water heater is. Mine was in the bedroom closet!