For a standard size stone (stone blocks from the Giza quarries) a stonemason needed about 4 to 5 hours with good tools. For a casing stone (from the Tura quarries) about 8-10 hours, for a corner stone probably more like 10-12 hours. To process the 500 stones daily about 300 stonemasons were needed and as much helpers.
It's possible to build a sliding barn door for the cost of the lumber, but there's still the expense of buying the track system ($100-$2,000, depending on weight capacity, materials, size and style). DoItYourself.com provides instructions for building a sliding barn door .
In addition to closets, they are also often used to screen a laundry area Like sliding glass doors, sliding closet doors are often called bypass doors. Typical costs: Plain or mirrored sliding closet doors in steel (less expensive) or aluminum can cost $50-$200, depending on size and style. For example, at Home Depot the Econoline 59x80 Painted Steel Aztec Gold Mirror Bypass Doors cost $97. Hardware is typically included with these doors and installation is relatively straightforward; hiring a handyman or contractor to install the doors can cost $50-$150 or more, bringing total costs for basic sliding closet doors to $100-$300.