Creating a niche for a drywall TV will require you to pre-design the design of your future design. It will not only have to fit the size of your television, but also provide enough space for ventilation. In addition, you need to plan a place for installing additional equipment and connecting cables.
Wallpapers go for Ksh 2600 per roll including installation. A roll covers an area of 5m2(10m by 0.5m)