Thanks! Those doors are the second most expensive thing on the booth. Only the range hood cost more and not by much! Hood, doors, a small two tube flourescent fixture and miscellaneous hoses, electrical switches and regulator/moisture trap included ran about $140. The wood was free. The legs were off an old bunk bed my kids outgrew and the plywood used for the booth itself were skip tops from work. Even the paint was left over. Certainly a lot less than $3000!
The airflow isn't optimal. Good enough for evacuating the acrylics I paint with. Not up to keeping out noxious fumes from lacquers or enamels. I'm thinking of modifying it to a backdraft system that can handle them "just in case". If I do it will probably cost me another $100 for a decent blower. Still cheaper and bigger than anything I've seen retail!