CyberKnife for Prostate Cancer

Can anyone give me any advice or share their personal experience if you have had the cyberknife therapy for prostate cancer?  Husband is newly diagnosed, biopsy was done and gleason is 6.  We are considering this therapy or seed implants.  We are against the surgery, for many reasons but the main ones being the side effects and time off work--he's already been told at his job if he needs 6 weeks off, it will be time without pay and we cannot afford that.  We also considered Proton Therapy in Florida (but again, cannot afford for him to be away from his job and out of state for the treatment time period) as well as HIFU, but that is out of our price range, too--we need something that insurance will help cover!  I appreciate any and all suggestions.