With it being only two walls and the fact it is already primed you could possibly get by with only one gallon, you will never know until you actually put the paint to the wall. Plus different colors might need additional coats depending on the color on the wall now and the color you are painting.
One gallon of paint depending on what brand , kind and where you buy can run from $ 10 - $20 . It can run even more but if you are paying more than that in my area you are not price checking. You could call the places where you found the paint sample and ask how much a gallon would run you.
|