I will create a detailed a cappella or choral arrangement

I've arranged for flute, piccolo, alto flute, oboe, bassoon, clarinets (Bb, Eb, alto, bass), saxophones (soprano, alto, tenor, baritone), trumpet, french horn, trombone (tenor and bass), euphonium, tuba, piano, guitar, string bass, drums, percussion (pitched, unpitched), Voice, and ukulele.

I arrange using Finale (V27), and am more than willing to share .musx files of your arrangement if you would like them.

I think playing an instrument is very helpful in learning how to arrange for it! I mostly play piano, trumpet, bass guitar, ukulele, and bass clarinet, but I've also performed on saxophone, flute, mallet percussion, flugelhorn, clarinet, and trombone.