Not for the purpose for quantifying the wealth of someone who owns no slaves.
And slavery is a definitionally different situation because a slave has absolutely no leverage to negotiate for their interests, so whatever quantification of a slave's value and consequent slave owner's net worth is not generalizable to relationships between free people except in very extreme situations.
Another way of looking at this is that all else equal, when freed, a former slave's net worth goes up by a constant factor based on their new status and rights.
And slavery is a definitionally different situation because a slave has absolutely no leverage to negotiate for their interests, so whatever quantification of a slave's value and consequent slave owner's net worth is not generalizable to relationships between free people except in very extreme situations.
Another way of looking at this is that all else equal, when freed, a former slave's net worth goes up by a constant factor based on their new status and rights.