Fixing rough areas.....

So I have a handful of lawns that need some areas fixed. I'm sick it flying off my seat, snapping bolts off scalp wheels. Over the years people have done stupid things on my Lawns, drive heavy equipment through them, have Leach Fields redone and then they settle 2 years later, and so on.
Some areas are a 30' set of tire ruts a foot deep, others are a 100'x100' leach field that settled.
The cost to fix it is a factor because obviously the customer doesn't give a ****, it's for me. And I can't...

Fixing rough areas.....