You can make a new acc. You can buy cash, and you can make the cash. I do not see what the issue is with the current name change price. Its supposed to be expensive for a reason.
If the name change price would increase that means people would have to really play to get the amount of cash, or either buy cash (which is the 100k bundle $8.99). Honestly I would just keep it the same but you never know it may change in the future if that ever happends.