Oompa, do you and your attorney have the Watchtower's secret child custody packet? It lays out the Borg attorney gameplan for divorce and custody court cases. You NEED IT in order to know what their strategy is going to be.
As for the JW lawyer. There are JW lawyers all over the place because JWs and the Borg are in court all over the place. They don't work exclusively for JWs - there isn't THAT much JW work - but if they are known in a city or region many of the JWs will go to them instead of a 'worldly' attorney. As for fees, these are attorneys we're talking about here. They charge what they charge.