I would love to help.
However from this vantage point in my chair ...at home, it would do you no good.
Only someone looking at the issues up close can put it all together for you.
There could be loose stucco, decayed wire mesh, wood decay, mold and plenty of water infiltration points. But getting an engineer, home inspector, or a really good stucco guy will be the best route.
Let us know what they find, and we can give you some advice you can apply to the issues.
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