Both a guitar and a pedal input / output would be ideal for you. Not familiar with the Befaco mentioned previously,
but check out what Boredbrain has --
For external guitar pedals:
https://www.modulargrid.net/e/boredbrain-music-unifx
And from another company, Noise Engineering, the Nive grad guitar input is good (you'll need a 1/4 > 1/8 cable adapter
which are cheap):
https://www.modulargrid.net/e/noise-engineering-nive-grad
Both are smallish and work well!