Find your niche: Extra storage space hides behind the walls of your home . Updated: Jan. 06, 2011, 11:13 a.m. ... using either plywood or framing lumber covered with drywall.

Drywall certifier's niche pays millions Four years after bankruptcy, an entrepreneur teaches drywall fixes. Michael LaForgia. Spiderman Mulholland was broke, embarrassed and looking to start over.