D.R. Horton, the nation’s largest homebuilder by volume, is purchasing Omaha-based Celebrity Homes’ lots and floor plans. Founded in 1977, Celebrity Homes plans to finish building houses it currently has under construction and will remain in business to honor warranties. Celebrity’s remaining 1,200 lots across the Omaha area will be built out by D.R. Horton, which is based in Arlington, Tex.