WOW - when it rains, it pours!
Sometimes rust can almost be like a welded joint.
FWIW - I like to run some old iron garden tractors, got several Wheelhorse, IH Cub Cadets and a Simplicity and for whatever reason, this year has been the year from H#@l for repairs. Were it not for a box store Cub Cadet and a push mower, we'd be baling hay in the yard! So to some extent, I feel your pain!