Building a Skyscraper is very expensive and requires paying a lot of workers to do a lot of work and to buy a lot of materials and use a lot of equipment.
You need to be rich to build a skyscraper or be able to get a nice big loan to build and construct the skyscraper or even to just buy a skyscraper.
Building a skyscraper costs around 3.5 billion dollars. So you'll need some deep pockets and a lot of money as in the billions of dollars amounts to construct a skyscraper.