What should we do if a soloist wants to rehearse with you?

He or she can come to my home-studio for a private rehearsal. If I need to go to his/her place, there may be extra charges applied. If the soloist is professional, we don’t even need separate rehearsals, and an alternative way is to rehearse before the prelude on the day of the wedding. In this situation my rate is charged starting with the rehearsal with the soloist.