Building a video chat app, using Jitsi meet, with a no bandwidth server

Hey everyone!
There are many similar topics, yet no other has came to a solid conclusion.

We are making a video chat up with rooms with up to 4 persons capacity, and we don’t have money either for a ready to use api or for running an open source video chat service on our server.

Recently read that Jitsi meet is using webrtc and is p2p. Does this means that if we implement it on our server, the calls will cost us no bandwidth at all?

Thanks everyone!