Complex sentence: Some of the family's advisors considered the situation to be irretrievable, and there was a proposal to transfer Chatsworth to the nation as a V&A of the North; instead, the Duke decided to retain his family's home if he could.
Split into simpler sentences: Some of the family's advisors considered the situation to be irretrievable, and there was a proposal to transfer Chatsworth to the nation as a V&A of the North. Instead, the Duke decided to retain his family's home if he could.