There are a lot of off-price stores that sell salvage goods, overstocks, and irregulars. I know the ones around here and they do sell those items you want very cheap. I have no idea where you are but I am sure there are the equivalents in your area.

If you go to Lowe's or Sears they have a section where they sell premixed paints that someone paid to have tinted to a specific color and then decided that they didn't want that color. They typically sell those paints for a few bucks per gallon. If the color is one that you can live with then there's your paint bargain ready to go. A gallon can (400 square feet) can do a room.