Every band I work with is a straight split - even though I often provide PA, lights and do the majority of the booking.
I don't see why someone should earn any more than everyone else unless you are hired as a 'session type' player for an agreed fee
I have a fella I’ve used in Kent, who refinished a warlock I was working on. He used to spray for rolls Royce and now does luthiery full time.
he may be a bit far away from you though. Happy to share contact details with you if you’d like though.
the butler vintage is a great p bass no matter what the name attached to it is.
Its a bit subjective as to whether a 'name' instrument will sell more than a bog standard one. However it does seem to draw people to them perhaps in the first instance - along the lines of "oh! a *insert name here * bass I wonder how that is.
Presumably the hope from there is that the instrument is good enough to sell.
I have sig instruments from different manufacturers (not my sig! LOL) and I bought them because they did what I wanted them to do and not based on the associated name