funny man.
If you get all your joneses out with one bass, I tip my hat to you, I can't do it with one bass.
I look at it all this way: back in the day, most professional players had one bass. That's how they got THEIR sound; by getting used to manipulating a bass for a variety of tones. That's why when people on the forum ask: I bought a P bass, why can't I sound like [fill in the blank]? Those professionals relied on technique, not gear per se.
Those professionals generally didn't have back ups. So it kills that argument as well. We're talking mainly 60's/70's.
A wise player (who probably owns dozens of bass, but you only ever see him with the one he is identified with) once said "...the most important thing is to settle on a bass then commit to it... Get to know your bass inside and out and play it in every situation you can."
These are my beliefs drawn from experience. I'd like to propagate this argument whenever I can on TB. Far too many members think you need all these unneccesary possesions. I ask you to honestly assess the question of how many hours do you spend on buying/selling/researching and how many on honest practice time? You have to start asking yourself questions like "is owning more fun than playing?"
I'm not saying owning only one bass is the way to go, I'm saying be content with few.