Nelson???s ???620 Corp Inc. has spent about $1.3 million on the project, including constructing a parking lot and adding the frame for a new entryway,??? arts critic Mary Voelz Chandler reported for the Rocky Mountain News in last January. ???He estimates another $300,000 to $400,000 will be necessary to bring the hangar up to the point at which someone can lease or buy it to use as office space.?