I have one more word for your relative:
Relax. Enjoy the building of your new home. It is
interesting. Be a partner with the contractor. He is not
your enemy. He is, right now, more proud of what he is
doing than you are. He wants you to be more proud than he
once you have taken posession. I have seen many, many new
homeowners worry themselves sick before moving in . . . and
for a year thereafter, looking for anything than they might
have missed or could go wrong. They have missed, forever,
one of the great experiences of life. Count the blessings.
They are many in a new home. Defects, like life, are sure
to be there. A house, a home, like a life ain't perfect but
it is a joy . . . if enjoyed.

Jim

That is on the verge of being true poetry. I've never heard it said better.