...each [bus] camera system would cost $5,000 to $10,000...

The Examiner reports on the proposal from the County Council to allow the Police Department to place cameras on the outside of school buses.

According to this article, the Police Department is now imagining "speed" activated cameras on the side of buses at a cost of $5,000 to $10,000 per system.

School-bus cameras proposed to fine passing drivers | Washington Examiner

...The bill, slated to be introduced by County Council Chairwoman Valerine Ervin, D-Silver Spring, on Tuesday, would authorize county police to install the cameras and fine offenders up to $250 for ignoring buses' flashing red lights and pop-out stop signs.

The exact mechanics of the school-bus cameras are still being worked out; however, they're expected to work like red-light cameras. Activated by cars' speed, the cameras would produce video that an outside vendor would cull into snapshots of the car ignoring the law, said Captain Thomas Didone, director of the police's traffic division...

...Didone estimated each camera system would cost $5,000 to $10,000, making a systemwide solution unrealistic. If the bill passes, police would work with the school board to determine which buses to outfit...