Depends Really...I bot Sharks overnight 3-4 days a week , then the other days im doing soul wars.
Sharks usally get me anywhere from 1.8-2.7m a night (Most was 2.7m Least was 1,8m) Average around 2.2-2.5m
So botting pays for the VLS , And if you JUST did target kills you'll get money back.