I have known several older musicians who also tuned the tenor guitar as a baritone Ukelele--DGBE, or the 4th-1st strings of a 6 string guitar. Seems that there has been quite a bit more interest in tenor guitars lately, & when folks ask me where they can get one which isn't so expensive, I sometimes suggest they try a baritone Ukelele before investing several hundred $$. I also have used the bari Uke to start smaller children who really want to learn guitar. It is surprisingly easy to play chords, & as they get older & bigger, they can usually easily switch over the a 6 string.