We're working on this right now.

From what I gather, to setup a base station with the radio up in the air on a tower or in our case elevator(reason for the extension harness) you will need:

RTK Base Station Bundle:       $2300
RTK Universial Mount:                $50
RTK Radio Extension Harness:   $150
ITC Reciver:                          $2500 (sf1 activated- don't believe you need sf2 activated for RTK)
RTK Activation:                      $3000
                                           $8200

For each reciever you will need:

RTK Activation:                     $3000
RTK Radio:                           $1295
Conversion for old Reciever:     $160  (you only need this if running non-ITC recievers)
                                          $4455

This is assuming your recivers are already setup to run autotrac- You still need the $6500 key cards and such as before.