Brake Hoses, Lines/piping, And Fittings problems of the 2000 Chevrolet C/k 3500

Had multiple brake line failures in the last 2 months. First being the main line to the rear brakes, then brake line to the right front wheel, then line to left front wheel. While truck was being worked on it was noticed that the front frame rail was starting to rust through near where the front bumper mounts, also noticed rust on the frame at front of cab area, this is not surface rust, this is rusted through the frame and has large rust scales. It is primarily in the area of the cab and forward. Frame seems to be okay from the cab back, problem is where the frame is enclosed.