First, you will have to check your poles to see
if you actually can run a rope or wire down the
inside. Some telescoping poles will work, while
others may have locking cams at the bottom of
each section that block the tubing.
Given the proposed length, you likely will need
guy ropes off the ends of the poles to keep them
straight, unless you use very light wire. In that
case, I’d either run the wire down the guy rope
or terminate it at the top of the mast. Running
it inside a metal mast may cause detuning and/or
arcing, partly depending on how well the wire is
centered in the tube and the insulation.
Remember that the free end of a wire is a high
voltage point. Granted, detuning isn’t as much
of an issue since you are using a tuner anyway,
But it can shift the effective length to one that
isn’t as convenient to match.