Orchard Clearing Recommendation

[Gus]

My house in Orchardland came with an orchard, that, mostly, I do not want. There are 8 rows of trees, each row about 75 feet with 6 or 8 trees in each row,varying in height from about 4 to 7 feet. The trees are mostly from the Pacific Northwest, and all require a winter frost to produce. All they do is get covered in weeds and brush and never produce. Does anyone have a recommendation of someone with equipment who can solve my problem without the need for a second mortgage?
Mahalo, Gus