This is very easy. I have here a small idea yet you may be get interested with it..
simple on how to create 5B or even 20B storage for your char. all you need is notebook and your account for rf online. (for pRFo you may need your level up account)
1. just create 1 0r 5(or as many as you would like) new account for RF
2. take note of your newly created accounts(username and password)
3. email your money to each and every account.
-- with this 1 account = 2B money
so 5 accounts = 10B mney
Hope it can help you.
BTW, emailing to other accounts will just cost you 5gold.....