Card concept: skins

Skins for troops would be awesome. Who wouldn't want to see their pekka dual-weild swords, or their archers looking like the archer queen? I've kind of figured it out, make skins cost 30 gems a pop, this is reasonable and will generate alot of money for them, even if they only add the max level skins for the troops from CoC. I would pay 30 gems for a badass looking hog rider. It would make alot of money, so there is no reason for this not to happen. Another bonus would have them randomly drop from chests, but ONLY from challenge chests, therefore increasing gems spending from those of use who don't want to pay 30 gems. This would increase sending all around, thoughts? Also you could toggle them off and on.