VT bass - $150 - Ampeg sim...
Digitech Bad Monkey - $50
EHX BBM - $80
Digitech bass synth wah (to use as octaver) - $90
Total - $370
Look on your bandmates' faces as you show up with a whole new pedalboard - Priceless

Much cheaper used from the classifieds of course.
That's one of many, many possible combinations.
Alternatively:
Digitech Whammy 4 - $200
Digitech Bad Monkey - $50
Boss Bass chorus - $90
Or sub a flanger or phaser for the chorus.
Steve