The first requirement of a satisfactory farmhouse is adequate size to
provide needed working area, storage space, and living and sleeping
quarters. For the average family at least three sleeping rooms are
needed,[2] one for the parents, one for the boys, and one for the girls.
[2] Sometimes the living room must serve as one of the sleeping rooms.
All the space may not be needed at the time the house is built, but
the chances are that it will be needed before many years. On the other
hand, many families find that after the children have grown up and left
home it is not necessary to use the entire house. For this reason it is
desirable to have it arranged so that part of the rooms may be closed off
or may be rented to tourists.