i'd get a repair panel, if you can weld or know someone who can.
to fix that, i'd say:
door off
wing off
bonnet off
cut out the rusted part, back to good metal
cut the repair part to fit,
weld it in
paint it.
wing on, door on, bonnet on, done
oh, if you cut out the part where the hinge bolts to, put the door back in place before tacking the repair part in place, to get the right location.