Answer:
Utilize the wall space and have the shop class design & build cubbies to size for the space.
Explanation:
To save on costs, the school could enlist the assistance of one of the technical classes to build the cubbies needs. The best place to build the cubbies would be against the empty wall in the gymnasium.
If the intent of the question is to find a way to build all 50 cubbies, then it may be necessary to try and locate a local supplier that will donate the supplies needed beyond what the budget of $500 can afford to purchase. One way to help offset the cost of the cubbies to incentivize the location by allowing the supplier to place their brand logo on the cubbies somewhere to show local support. Oftentimes, companies will help local schools when they are able to receive a benefit such as advertisement space for the donations.