Explain why most Sikhs do not have a Guru Granth Sahib at home?

First of all, the Guru Granth Sahib is an incredibly sacred document. It's not just a recording of the teachings of the ten Sikh gurus, it is treated as a guru. There are very specific rules regarding where this book is kept. First of all, it must be in it's own room. It must be placed on a Manji Sahib (a bed-like throne) of very specific dimensions and covered with a canopy. It must be covered with a cloth (I believe the type of cloth to be used varies with the seasons. The Guru Granth Sahib must be next to a Chaur Sahib (a clump of artificial hair that fans over the guru) and a platform for sacramental offerings and food, called a Karah Parshad. This is not something the average person can provide in their home. Also, the Guru Granth Sahib is a rather large text. Before the middle of the nineteenth century, every copy was handwritten, so it makes sense that there wouldn't be enough copies for every Sikh home. Though it is mass produced using printing presses now, it's sale is closely regulated by the Sikh's official religious body based in Amritsar, a district in northwestern India. There are also strict procedures that must be followed when transporting the document. This is an enormous amount of trouble to go through, and most homes just can't accommodate the environmental requirements of the Guru Granth Sahib.