Come on, guys, It's not a hearse, and never was. It's not a home built, either. It's a "FLOWER CAR" used in funerals. Funeral parlors use them in the funeral processions from the parlor to the cemetery. The flowers that are brought to the funeral home during the wake, are transported to the cemetery in the funeral procession, in these cars.
...and it's not a new idea, either. "Flower cars" have been around almost since the invention of the automobile.