A customer of mine wants there lawn cut extremely short. They really don't have much lawn really , its mostly weeds, rock and sand , just some grass. Along with that there house is run down.The last time I cut the lawn they were not happy with it at all. Even though I thought I cut it really short.They wanted the lawn really cut short. If I was to drop my blades to the lowest settings the rocks they have on the lawn could possiably damage my machine. What do I do explain or run from this person.