A team which clearly really enjoys making some stuff, I could hear you guys giggling through your heat (as well as your film in some parts). Put a smile on my face.
I think this might be the most resourceful "we weren't prepared for musical" musical I've ever seen, jumping from music-less songs read off scripts, rythmic dialogue and royalty free instrumental solos - and these landed pretty well with the audience.
I think, beyond a story line I didn't quite understand, my main issue with this film would be the tonal issues- pretty strange to see a movie about a walking/talking bush coupled with serious take downs by his brother (I think?). It's hard to take the drama seriously when the comedy is so silly.
As for your title, "The Life of Brandon the Busking Bush" is great and intriguing.