I purchased one from TreeStuff.com a few weeks ago, and I'm kicking myself that I didn't grab one when they first came out.
I've heard all the "I'll build my own" statements. Personally, one of the best pieces of business advice I ever got was "Figure out what your core compentencies are…the things you do better than everyone else, which really make you stand out as a service/product provider. If a needed task doesn't fall into that category, either: 1. Change your business model, make it a core competency and start doing it full time, 2. Don't engage in it at all, or 3. Outsource it to someone who makes that task their core competency."
We're all smart people, with diverse talents, but gee, if you're that good at welding, why not shutter your tree business and weld? If I've got time to even seriously think about taking on a project like that, it means I should be hustling more tree work!
I decided that, for less than what I earn in one day doing what I do best, buying the Arbor Trolley made lots more sense than trying to reinvent and fabricate a well thought out piece of "off-the-rack" machinery.