I don't know if you are trying to attract full fledged builders who can hit the ground running or players with the interest and love of terrain building who you can bring up to speed on your projects. The former, that's show biz and it's breaks. The latter, here is an idea to get some nibbles.
When Hitech needed us to test the terrain editor in the alpha with those awful colored tiles, I tested the terrain editor knowing zilch about how to use it. Going through that process was entertaining and I kept at it because of an idea from TT on AH2's CraterMA. I wanted to create a gunnery terrain to help tankers learn their sights and estimate range. And figure out how to get a wirbel within 500yds of a drone. The rest is history.
Personally I think the AH3 terrain editor is a fun tool and one heck of a way to loose a few hours without knowing it.
To interest the first time TE player in the idea of the terrain editor in AH3.
"You" create an un finished terrain with a map and zip it up with instructions how to setup the directories and files. Say a small island with all elevations set as flat plateaus in need of sculpting and finishing with no terrain painted on yet. Place an airfield and a town on it for visual continuity. Allow the players to do anything they want from there including adding on more ground and more objects. Adding in ports and task groups, GV spawns, PT spawns, air spawns, whatever. As long as they end up with a final product that has shore lines, no gaps on the terrain next to objects, and you can run it offline to check it out.
Include a short write up so they can quickly get to adjusting elevations by hand, painting terrain by hand and add\moving\rotating\deleting objects by hand. New maps if they expand the ground, saving and "build". Link them to the new terrain editor manual in process by Easycor, and set them loose.
Post up screen captures of the rough starter terrain in a POST here with a link to download the project and be available for questions. Skin in the game so to say while there are no guarantees you will get a single nibble. Or, you will get subsequent posts with pics by players to show off their progress. When people can see pictures of what you guys talk about at the nuts and bolts construction level like I've posted up in Oboe's POST about using aircraft as terrain objects. The secret handshake boys club aspect falls away and makes the process identifiable with, inviting, and demystified.