When the "Live" mode occurs in the game, the player may enter "Build" mode or "Buy" mode to pause time and renovate the house or lot. When the game begins, each family starts off with 20,000 simoleons (regardless of its number of members). These funds can be used to purchase a small house or vacant lot on the neighborhood screen.[11] After purchasing a lot, a user may construct or remodel a house in Build mode or purchase or move furniture in Buy mode. All architectural and customizable features and furnishings in Build and Buy modes follow a square-tile system in which items must be placed on a tile. Walls and fences extend along the edge of a tile and can follow the edge of the tile or cross it diagonally, but furniture items cannot be placed on either side of a crossed tile. The base game contains over 150 items, including furniture and architectural elements.[11]