What options are there in the PVE mode Fortnite Save the world VBucks to farm?

I already have all 500 VBucks from the collection book so from level 5, 26, 36 and 91 and meanwhile I'm already in the 50 VBucks challenges so far that it takes more than 2 hours to get VBucks at all. And no I'm not able to spend money on the game! I do not come from the richest conditions. So there are possibilities 500 VBUcks a day?

Collect your daily bonus. You also get many V-Bucks