Heavy equipment always has a heavy price tag and the costs of replacing or fixing can be heavy too!
The guy that "borrowed" and kept it for ten years would have had other thoughts if he was billed per time for the period he "needed and leased" it.
If you have to give someone a heavy equipment even for free, make sure he know the value and cost of leasiing same if he were to pay for it. It does two things:

• You get it back in good time
• You get back in great shape