Transferring your account is against Xbox Live's Terms of Use. I bolded the part that is relevant in this situation.
5.Your Service account, associated accounts and accounts from third parties.
Only you may use your Service account. You must keep your accounts and passwords confidential and not authorize any third party to access or use the Service on your behalf unless we provide an approved mechanism for that. You must tell us right away if you suspect misuse of your accounts or any security breach in the Service. For some parts of the Service, you may be able to set up additional accounts that are dependent on your account ( “associated accounts”). You’re responsible for all activity that takes place with your Service account and any associated accounts. Except as otherwise stated in this Section 5, you may not authorize any third party to access and/or use the Service on your behalf, except where we provide a mechanism for third parties to access the Service on your behalf. We may limit who may use your Service account or any associated accounts.
I don't think we can really provide any solutions for you without violating Microsoft's ToU.
