I realize there's already a thread about this, but it was locked and requested more information.

Basically, the Capture Wild Pet page tells me that Observers cost 20 coin each to hire, but when I actually hire them they only cost me 10 coin each.

When I hit "Prepare an expedition" under these settings, only 30 of my coins are removed. I don't have a screenshot of this now but will be able to grab one in a few hours when the "new week" begins.

You pay 20 Silver Coins for hiring an Observer AND 10 Silver Coins for sending him to expedition. These are different objects of expense.

Oh. I didn't realize there was a difference between "hiring" and "sending out". I guess I should go back and read the FAQ again. >_>

Thanks for clearing that up!