Sign up for an annual membership on the genealogy websites (like ancestry.com) and then offer your services in the local paper...such services being the research of family genealogy.
Many folks are willing to pay for such research but cannot or will not learn the intricacies of such sites and, as such, are unwilling to make long-term commitments to such sites that are often needed.
Use your imagination...and good luck!
That does sound interesting.
Thank you SonOfDarkSkies.