About to bid on a clearing job. Area is roughly 100ft squared and covered in vines, a few saplings, two 10" diameter logs (about 50' each), and a few stray concrete blocks. The vines are up to 3" in diameter, and are very dense. The depth of the vines is about 2' on average. Going site unseen, roughly how many 10 yard dump loads do you think there would be?