oh man,,, documentation, pictures. i would go so far as hireing a home inspector $200.---$400. for a inspection and recomendation
caulk is useless, it is a cosmetic thing ONLY. if anyone says other wise, they do not know aything
the outside of the building needs to have the siding, framing removed and redone. while it is opened up
an inspection of the foundation should be done.
digging a hole, filling with gravel is about as good as caulk
a hole needs to be dug to BEDROCK, then hole should be filled with concrete WITH rebar. to stabalise te corner
call a foundation company to have them give you an estimatement of what needs to be done
also,,since you have been unable to enjoy your home. the hoa needs to reimburse all your living expenses
sounds like its time to call shyster,shyster, and goldstein or the other law firm dowe cheatum and how