Okay, say we knock it down to 1/month, command-word activated, no item slot, and make the XP cost payable by the user (25 XP/level back the modification goes). Factor in the minimum XP cost it would cost any manifester, 25 XP, and I come up with (7*4*1800*2)/(5/[1/30]), or 6315 GP. This still...