I'd just keep saving for the 4003 - get the one you really want.
The 4003 won't do the P Bass thing. A P Bass won't do the 4003 thing. They're different animals.
Precision. 4003. Jazz. Fretless. That's been my lineup for a few years, though I sometimes think a 5 string or HB-equipped bass would be nice.
If I had to target one to eliminate, I'd eliminate the fretless because I really don't play it that much. My second choice for elimination would be the Jazz because it feels like a cross between a Ric and a P Bass and overlaps those two in some ways. The Precision and 4003 get the most use here.
The 58 AVs are really nice. I just sold one which I had for 2 years. A (fretted) vintage-style Precision Bass is just one of those basses I will probably always want to have available.
Once you have them all, just step up to a better instrument when/if the time arrives, but don't sell one base/bass to cover another.