to get chromatic or not
Instruments- discuss specific features, luthiers, instrument problems & questions
It's important to remember that any dulcimer sounds very different from a guitar, so the comparison of a chromatic dulcimer with a 3 string guitar is completely spurious. In my opinion, a dulcimer is far more versatile than a guitar in terms of varying tonal qualities. I've played both instruments for well over 60 years, and I can do far more with a chromatic dulcimer than with a guitar. On the other hand, the dulcimer is easier for a beginner to pick up than a guitar is.
Another important point is that many of the dulcimer like instruments from Europe are also chromatic and date from at least as early as the 15th century, so the precedent for a chromatic dulcimer is far older than any diatonic American instrument.