The challenge that I was talking about will be going inactive since the host went offline for reasons you can obviously guess and I'm giving out the idea to those who are interested and are able to handle by one or split up to a few to make this challenge's successor.
I am going to suggest to make it slightly more different than the predecessor. Here's the following:

At least have the instructions, island stats and limitations be placed on a document file as well as a few rules, the rest can remain on the post description itself.

The prize should be reduced all together since the previous was a bit more of an overestimation whenever not enough players had participated.

I will also add a few more ideas: At least make a diplomatic system and make the freedom to allow multiple roles and non-airplane vehicles.
ALSO, LIMIT THE MAXIMUM TO 800/600 PARTS IF POSSIBLE.