Using HomeCrafter, Wall and Floor tiles can be imported into the game at a cost of $1, allowing the user to place Floor tiles and Wallpaper for a fraction of the normal cost. Remove the user-created Wall and Floor tile files from the GameData\Walls or GameData\Floors folders and the Wallpaper and Floor tiles will reset to other (more expensive) tiles.
For more Tips & Tricks for playing The Sims, including Time Management, building Skills, and getting more money, click here.