In most States, you can use real property to satisfy a bail, which typically requires you to obtain a current appraisal, tax records showing the current tax liabilities, the mortgage statement from the lender or a clear title, and the agreement of all of the parties with an interest in the property ownership to the property being used to post the bail. The value of the property is then evaluated against the amount of bail to see if there is sufficient unencumbered equity to cover the bail amount plus 20-30% additional value. Each jurisdiction typically has specific criteria that applies that you will need to discuss with his lawyer to ensure that this process works in his case. Good luck.
DISCLAIMER I do not practice law in your State. This answer is provided solely for informational purposes only. This answer does not constitute legal advice, create an attorney-client relationship, or constitute attorney advertising.