An observation:
To summarize all the “get a day job” type post, of which I think I have a few in this thread.
I have been blessed to work with several of my bass heroes over the last few years, I will not drop names, other than to say several have very popular signature basses, and much to my surprise and delight I can actually say many of them are friends. I also think of bandmates from years ago who have been far more successful than myself and have moved the needle of music, and I have to say at least as it applies to me, the have a back up plan would be the worst advise I ever got, I remember talking with a guitarist bandmate 30 years ago, and the look of utter confusion when I asked what his plan B was, my was if we don’t make it, Mine was going into the Army and joining the band. Failure wasn’t an option for him, or at least the thought of it wasn’t.
Having some of the high profile friends I have now and thinking back, my plan b, c. and d didn’t go anywhere like I thought they might, and may have just been a pre-acknowledgment of planned failure. The God of music seems to bless those ignorant enough to believe they can make it.