It is true that most of the world's urban areas are becoming larger, with megacities like Delhi, Jakarta, Shanghai, Beijing and Manila adding more than five million people in the last decade and most other urban areas are growing, but not as fast.
1 With professional installation, a central vacuum system can cost $800-$4,000, but averages about $1,200-$2,000 for new home construction (or as part of a remodeling project where the walls are already torn open) and $1,500-$2,500 for retrofitting an existing house.
Replacing a window motor can cost $40-$300 for just the part, depending on make and model of vehicle and if the part is OEM or aftermarket; 1.5-3 hours of labor brings total costs to about $150-$900 or more.