I am signing a lease on a small apple orchard, about a half-acre, with 50 dwarf rootstock apple trees. The trees are in clumps and rows, not very orderly with the layout. Being dwarf, and structurally pruned for production, they have a wide branching habit with the main laterals just a few feet off the ground. They're also quite close together, so in some places, there may only be 6 feet of head height.
Here are some pictures so you can see what it looks like:

Dwarf trees planted too close together by natjwest, on Flickr

Quite overgrown field by natjwest, on Flickr

Nat and Jeff discuss by natjwest, on Flickr
My immediate need is for a piece of equipment to clear brush and cut long field grass. It hasn't been cut yet this year so where the deer and people haven't trampled it down, the grass is head height. It's mostly grass-type, not woody, but some blackberries and other brambles. There are some hidden stumps and fence posts and trellis/espalier wires to contend with. I have never done this kind of work before (on this scale) so don't know the right kind of mower for the job.
Would a "brush mower" like this work?
Brush Cutter Mower
I used to have a BCS 730 with Kohler 8hp, now I regret selling it. (At least I sold it for exactly what I paid for it used.) With that machine, I would have added a brush mower or sickle bar.
Not only for now, but for ongoing, would a sickle bar or brush mower be the better tool for managing the orchard ground?
The next step up would be a small tractor, but I fear not being able to get under and between the trees. If I were to step up to a tractor, I would want a front loader, but that's too pricey.
What's the best tool for this job? Thanks!
Here are some pictures so you can see what it looks like:

Dwarf trees planted too close together by natjwest, on Flickr

Quite overgrown field by natjwest, on Flickr

Nat and Jeff discuss by natjwest, on Flickr
My immediate need is for a piece of equipment to clear brush and cut long field grass. It hasn't been cut yet this year so where the deer and people haven't trampled it down, the grass is head height. It's mostly grass-type, not woody, but some blackberries and other brambles. There are some hidden stumps and fence posts and trellis/espalier wires to contend with. I have never done this kind of work before (on this scale) so don't know the right kind of mower for the job.
Would a "brush mower" like this work?
Brush Cutter Mower
I used to have a BCS 730 with Kohler 8hp, now I regret selling it. (At least I sold it for exactly what I paid for it used.) With that machine, I would have added a brush mower or sickle bar.
Not only for now, but for ongoing, would a sickle bar or brush mower be the better tool for managing the orchard ground?
The next step up would be a small tractor, but I fear not being able to get under and between the trees. If I were to step up to a tractor, I would want a front loader, but that's too pricey.
What's the best tool for this job? Thanks!