How would you resolve this?

A 14 year old boy who lives behind us fired a crossbow into our patio door and shattered it.
The glass replacement is $400. His dad died a few months ago so it’s just he and his mother, trying to get by.
Would you take the cash or work out lawnmowing or other chores instead?
We want him to learn a lesson as he easily could have killed someone but also don’t want to add to their financial burden.
What would you suggest?

Note: We have warned him many times with BB guns and bow/arrow. Now he’s using a powerful adult crossbow in a residential area. We did not pursue charges with police.