Building a Home Bouldering Wall is not an inexpensive thing to do, however the benefits it brings you usually outlast any monetary investment. Below is the simple math of an initial climbing wall and its expenses.
Climbing Wall Angles... via Home Rock Climbing Walls and Atomic Holds
DIY rock climbing wall for kids
How to build a bouldering wall at home. http://www.metoliusclimbing.com/pdf/How-to-Build-a-Home-Bouldering-Wall.pdf
(Freddie Wilkinson) Indoor overhang climbing bouldering wall
Westminster School Bouldering Wall
Chalkboard paint for path/instructions // home climbing wall at amazing retreat in Japan - links to source!
Building a bouldering wall | Our Life Outside
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Backyard Climbing Wall | Make: DIY Projects, How-Tos, Electronics ...