Don't bother with anything shorter than 26" scale length. Cheap guitar banjos are built to fit tenor banjo cases so have 22" (give or take) scale length.

The short scale, coupled with the flimsy tailpieces on these mongrels makes them virtually useless for anything but ragtiome fingerpicking. Even for that, they need re-stringing with 13's as they're shipped with 9's.

banjos are banjos, guitars are guitars. Live with it.