Rent a dozer for $500 a day. Solved.
CDNsldr , i have the big Stih clearing saw but the harness is sh*tty . Yours looks better , Is it a Husky ?
A manservant
Absolutely.
Hire a guy or two to follow you around and play pick-up-sticks.
Last year I helped my parents making a driveway to their "retirement home/cabin" site. Used the chainsaw for stuff bigger than 2" and the brush trimmer on everything else. We had two operators and two people cleaning the carnage. It worked well.
Use the 6" blade Hatchet battery chainsaws... I have the Milwaukee version pictured below... I bought two spare batteries for it... this tool is also great for butchering game. It is light and easy to use one-handed allowing the other to hold and throw the brush... I cleaned 30 km of trails with that and a Fiskers Hatchet.
If you don't mind a few days of peace and quiet in the woods, I suggest a Silky style Japanese pruning saw, and a Swedish Axe, the thin bladed unit with a metal bow holding the blade. You can move a lot of material in a day, with those, and it won't leave your ears ringing!
Careful with the Swedish axe (Eugene) though, I was using one a while ago for a day for some quiet work and I was lopping down lots of 2" trees and did it ever hurt my wrist after. Bad idea... Back to the brush hog, chainsaw, and clearing saw for me...