Chainsaw.... Use it to cut down the trees. Then use it to cut out as much of the bushes as possible. Check the root sizes from there, and just pull/dig them out. It would take no more than 2hours to have the bushes cut, pulled, and loaded. Especially if there are two guys. The trees wouldn't take the long either. I beleive someone mentioned renting a stump grinder for the bushes? You're going to have to grind the stumps out from the trees anyway. Maybe this would be the best root, chainsaw and sub out to someone with a stump grinder? What did you end up doing?