Ah, yes. Mr. Bojangles. I had a 12-string. Swapped for a 9-string that works for me, especially running bass lines. (Both E's and are singles). Works for some John Denver songs also. I try to sing upbeat and uplifting songs, no drinking, running around , killing or loss of love. That's because if you get memory care folks down or sad, they are more of a challenge. I try to get them smiling. The 12-string had too much tension the last time I had fretting hand issues. I use a few 6-string guitars for alternate tunings (like open G or D). I usually play finger style.
That Harmony certainly projects! Interesting how a 12-string seems to enhance the atmosphere of a song. Definitely switches up the tone and texture of a performance. I had a second-hand Yamaha once but didn't really know what to do with it. It certainly had a foible or two so I went along with someone else's suggestion that they were one-trick ponies. Turns out the answer is to try lots of songs.