Does being delusional count as a mental health issue? I too was mocked (oh yes I was, j08) for trying to appeal for kindness for *Frank as I felt some posts were unintentionally cruel, but there is a strange quality of paranoia (the "friends of frank's father's lady friend and the soi-disant reporting to the police) and obsessive - the single sex gym issue and the constant harping on about money/houses/care home fees.
If you were to respond directly Frank instead of banging on with weird things usually prefaced by "Obviously" it might be clearer. You see I think there is nothing obvious about a woman in her 30's asking an old codger to help her search her house for her mother's money. It is just bizarre.
Oh, and most people keep their money in the bank, their valuables in a safe and their jewellery if not in the safe, in their dressing table, for future reference.