...call Mark Fackeldy in Tampa Florida at Zephyrhills Autoharp and chat with him about what chording arrangement you might want. He can suggest a chording arrangement and any modifications necessary based on your vocal range and songs you might want to play. Then you can buy a used 21 bar harp and add or subtract chord bars yourself. A good used 21 bar harp should cost in the $225 to $275 range unless you are lucky enough to find one at an estate sale. Or ask among your friends about a 21 bar harp which is not in use... some of my humble advice...