Length of farming required characters for this event

I did it in 3 months without spending any money! But I didn't farm anything on the side, be sure to farm them with your energy and ship energy as well (Jolee and Zaalbar), refresh once or twice a day as much as you crystals revanue allows it! I farmed Mission first as she needs 16 cantina energy per try and is longer. You will probably need a T3 pack at the end but by farming nothing else (gears or toons), it should be possible!

Good luck.