Hyper ST Pro Brushless project?

[Mystro]

Hi, my name is Bryce, i live in Australia and im new here.

I have owned a few RC's and i currently own a Traxxas Rustler with Velineon motor and Mamba Max ESC. I have decided that i want to move up to something bigger, better and more fun. I have decided to go with the Hyper St Pro which i will covert to brushless using the RCM motor mount. I will be using my Mamba Max ESC with a Medusa 36-70-2000 Motor with bec on 4s Zippy lipo for the time being until i can afford a MMM.

Is there anything you would change and where are the cheapest places to buy these items?

Cheers
Bryce