Trolley carts - Fortnite

Fortnite is introducing their first-ever vehicle... A trolley cart? Theirs a bit of a commotion at the moment based on how the trolley carts work, whether a player pushes while the other is inside shooting lads, or if they both sit in the trolley while someone controls it. There are so many ways it could be used, could even be used by standing in it. I personally think that someone sits in the trolley and your teammate controls it from the back. I more curious about whether its free or not. There are rumours that it costs v-bucks and if it does then I probably won't be buying it.