Looks just like my old Browning Hi-Power that has been sitting neglected in the safe for too long. Have to wonder if the FN triggers will work with the old Brownings. Only complaint I ever had with that pistol was a mushy, crunchy trigger. Damn accurate and would eat any ammo I ever fed it.
Sorry to hear about the issues with the adult children. I've been blessed with two grown, happily married daughters that were a helluva lot less trouble than their dear old dad. My only 2 cents comes from my own personal experience as a FU in my younger days - I learned less when someone bailed me out and cleaned up my mess, than when I had to learn to sit in it.