wakeboard with a ski rope

How crucial is it to have a wakeboard rope? Can I use my ski rope? What will I notice the most? Also until I get a skylon extension pole should I try wakeboarding off my ski pylon or the back of the boat (95sport nautique).

If you are just starting to get up on a wakeboard its not crucial but I would really not waste much time before you switch to a non-stretch line. On many of the tricks (even basic tricks) you are building up line tension ready for a release, you can't do this (easily) and keep the line under control if you have a line that stretches.

Its not impossible but for the cost of a line there is no point making things difficult for yourself the early progression in wakeboarding can be frustrating enough anyway.

Most very good wakeboarders will tell you they care more about the rope than the board. They can do difficult tricks on any old board. They can't do them with a lousy rope.

There is no issue with the low pylon. If anything, one learns to use technique, rather than use the high pylon as a crutch. At some point the low pylon limits the super tought tricks. But again, the very good wakeboarders can do more tricks off the low pylon than most of us will every be able to do, not matter what equipment we are using.
BKH

A low stretch rope is a good idea. Not critical for learning. You don't want a rope with no stretch....I remember trying one a long time ago. Talk about making you tired fast!

I tell everybody that the best thing to buy if they want to be a great (insert sport here) is to run gas through their boat. You can spend lots of money but putting the time in is what builds skill.

Your getting buff by taking parts in and out of your boat though.

Just pay the money and get a good rope

Buy a cheep line and handle combo package that has multiple connection loops/sections probably in 5' sections from 55' to 70'
With the multiple sections you can adjust the length for different people.

For example you can go at 70' when somebody is just starting to jump the wake so they don't need to worry about the second wake or they have lots of space to ride comfortably behind the boat between the 2 wakes without any worry of going over the wake, this is also a great place to practice surface control.

As you progress and start jumping the wakes start down at 55 or 60' (obviously speed dependent) and as you get better lengthen it back out, but make it easy for yourself.

Oh and remember NO CHARGING at the wake, you need a progressive edge (plenty of info about this on the web).