The most frugal thing you can do to save money on your walls
is to paint them a neutral color and live with it for a long time. You can
put up wallpaper, but it will go out of date sooner.
Walls should not be expensive for the thrift conscious.
Lay pictures on the floor and
arrange them before putting them on the wall.
Use small nails and use a stud
find when hanging pictures.
It is worth the money to buy
small samples of paint. Color looks different in your home than it does in
the paint store. Painting is a lot of work. Better to spend a few
extra dollars and make sure you are going to like the final result.