Hope this clears some things up:
You will be needing roughly 35,163 Red Chinchompas with Full Void and Hawk Eye using the Skele method, But since you are using Soul Wars I don't see much difference.
The cost of 35k Chins are 26,618,391 GP But you may not need 35k Chins, it all depends on how many games you win. If you go winning every game you could cut that in half.
-MiM3