concur fully with 
@robav8r.   Having a command ballcap makes you part of the team. Nothing says "not from here" or "bootcamp" like not having a command cap.  Theres  nothing better than having a really salty command ballcap, bonus points for having one in a different color.  IMO the command cap is one of the  modern naval traditions.  Knowing salute isn't hard (as an ENS: everyone). 
Also, $20 is a hard pill to swallow?  I used to spend at least $20 in new patches and nametags.  Might as well add a ballcap to that bill.