That seems high to me, but it depends on the site, how well it is done, and how much regulatory bureaucracy exists where you are at. My last project would have gone fine within my budget if not for roadblocks thrown up by the county surveyor. I gave up after that. In my opinion , bad regulation may be doing more environmental harm than good in some cases. And I am a biologist that is restoring a 100 acres of wildlife habitat on my place.