How often are you planning to use it and for what? I had a Troy-Bilt with power pruner attachment when I first started out. It didn't last very long even with light use, about 30 days.
I've got the biggest telescopic power pruner Echo makes on one trailer and on the other trailer I've got the Echo Pro Attachment Series (PAS) power pruner with an extension. Both are fantastic and going on 5 or so years old with heavy use and aren't showing any signs of slowing down.
You get what you pay for and breakdowns cost you time and can cost you customers as your reliability can come into question if you have problems and need to put off jobs.