The BTS Committe has voted to reduce the fees for operations that take place on the BTS blockchain. As a result the staking fee is now significantly reduced to ~ 0.18 BCO. Now anyone, regardless of the number of BCO that they own can create a staking position.
THE BTS-RFC to reduce the fees is available here http://cryptofresh.com/p/1.10.7264
Details about fees on CryptoBridge was explained in CryptoBridge Fees Explained
NOTE: Staking Fees cannot be refunded since the fees went directly to Bitshares to execute the operation on the blockchain and not to CryptoBridge