I wish I were an investigative reporter in the Low Country because I might know how to check for other business interests, real estate holdings, and living trusts (tax records?)
If someone knows how to research this stuff, might be interesting to know more about who has what.
To my very general knowledge, researching is dependent on how deep the assets are buried.
As another poster illustrated, many people in high risk professions and wealthy people take prior precautions to protect assets from law suits. That probably involves burying assets at varying degrees of depth.
On the surface, public County Tax records show who pays taxes on a specific property parcel. That usually equates to ownership- but not always. Likewise, in many States, the ownership of LLCs are public records.
But.... going deeper, some states allow a generic "holding company" that provides their services for fees to be listed on readily available pubic records as the owner of a particular LLC.
Further layers of depth can be added by having an LLC in one state owned by another LLC in Nevada or Delaware. It is probably also possible to have an LLC pay taxes / own a property parcel.
Delaware in particular has a decades long legal tradition of banking and cooperate secrecy. Nevada evidently likes Delaware's cards and has followed suite with similar laws. Some states, including Nevada and Wyoming also have legal trust arrangements that offer degrees of anonymity to owners.
I imagine that research that is not assisted by Court orders runs into a brick wall in Delaware, Nevada, Wyoming etc. Even research assisted by Court orders is probably very difficult- and perhaps
de facto impossible in some or many cases.