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.
Our family vehicle is a 2010 dodge grand caravan 4.0 litre V6 that has a cracked radiator support. I hear these things are a pain to replace. The part alone, from the factory, costs 400 dollars with shipping. That doesn't count rivets, bolts, nuts, screws, etc. I have found it as cheap as 260 with shipping.