Jay if anything I would look at getting a decent mount first. Then slowly build your equiptment up and upgrade as you go/feel more confident etc. Its a slipperly, expensive slope mate but once you start pulling some data together you'll be dying for more!
Keep your eyes peeled on the classifieds here...theres gem setups that come through for cheap! I would look at getting a HEQ5PRO minimum and go from there, anything in the ED80 range will be perfect for introducing you to the world of AP, but remember theres lots of little accessories in between that also add up too that are essential.
Will you have access to power where you plan to do your AP? And do you have a laptop? You'll find that you'll keep bumping into these hurdles as you dive further and further into it haha goodluck!
Darc