Some of my customers have had success renting specailized equipment like crushers and screening plants for producing aggregate from the excavated material. There are not many doing this which allows you to get good money for your equipment.

If you had a loading shovel, an excavator, a crusher and a screen you could charge you customer a cost per ton.
You could make subbase, pipe bedding or general fill

Many people are renting just excavators and loaders.
The prices can be very competitive

Check out my website http://www.agg-pro.com/
Or give me a call if you have any questions

Thanks

Charlie