There certainly are some brill tips here, particulary from Marion.
I have only done a bit of busking myself and, although I am primarily a singer (mostly traditional and unaccompanied), for practice I played my concertina without singing.
What are people's experiences in terms of the mode of performance? Do you get more money by singing unaccompanied, playing solo or singing with accompaniment? (Of course, I acknowledge that over a longish period the lets-stave-off-the-boredom factor may suggest a mixture.)
"Dancing and singing, bell ringing...!"
Alan