I found this great video on EHow.com, the narrator of the video gives some great key points you need to take into consideration before buying or taking on the responsibility of building your own paint booth. There's government, state, and county regulations you need to research. If you plan on building a paint booth, you should think about having a fire suppression system. You need this just in case a fire breaks out or any explosion occurs, because you will be working with flamable spray paints. Watch the video for more information on paint booths.