There is very little business value here. There was a customer base, which is known as Leads. This is the same as a referral process. Don't let hindsight be used for valuation; what you have going now is because you pursued getting credentials to invest in making yourself a new business.

If you are still working under some dba for purposes of letterhead, and that was carried on from her days, then offer to change it or offer to pay for the right to keep it.