Hi Tee Dubbs,
My partner spent many years doing auto body and fabricating work. He took a look at these pictures and this is what he had to say. Hope you don't mind me passing it along.
In the pictures, the damage appears to him more extensive than just a kickstand attachment problem.
The damage he sees would require skilled welding/fabricating to properly repair. For the cost you might end up paying someone to do it (if you find someone whose work you can trust), it might actually be cheaper to 1.) Find a donor frame with that particular section in good condition and cut out the weak/bad on your frame and replace with the donor section. 2.) Replace the frame entirely with a good frame.
You would have to look around at prices of each option to find out which one would actually be cheapest and give the safest result.
The corrosion seems extreme and a bit inexplicable, but whatever caused it may have been the reason the kickstand failed in the first place.
Hope that is at all helpful.