How Many Beats for a Producer Beat Tape?

If we are talking new unknown music producers, what is a good amount of beats to release on Spotify and how frequent should we drop Beat Tapes to grow a new audience? I am looking to do this route instead of selling beats online. I want to create Beat projecs maybe every 3 -6 months, maybe add some singers or just hooks. I do want to go and do the project route instead of posting Youtube beats.