My house is built on a hill. The backyard slope is OK until about 2/3 of the way then there's a steep drop and a whole bunch of brush, medium sized trees and saplings for the last 1/3. The last 1/3 is a mess and I literally lost a chicken in there last year. Our tree guy came out today and gave me a great quote on clearing the whole mess out with the exception of three large trees. My plan is to make the slope much more gradual by filling it in with dirt. So, where do I get the dirt? And someone to spread it around because that's a lot of dirt. Who would know how much dirt to get? Thank you!