How infeasible is a Kuiper Belt equivalent of Dawn Options

[Tom Womack]

I presume that it is completely infeasible without a very powerful nuclear reactor and many years' production of ion engines to do anything remotely like Dawn in the Kuiper belt - the distances are just too long.

Is it in fact feasible with current technology even to get a probe into orbit around Haumea or Makemake? I'd suspect not, that the speed you need to get it out to the Kuiper belt in a lifetime is much too great to cancel down to orbital velocity.