To the extent that funds are appropriated, the department shall fund the program as follows: The department may accept funding from the federal government, or other public or private sources, to purchase or lease new or used railcars and to refurbish and remodel the railcars as needed. Nothing in this section precludes other entities, including but not limited to short line railroads, from performing the remodeling under RCW 47.76.400 through 47.76.450.