How old are you?
What do you want out of life?
What's your support structure look like?
The reason I ask is because under the right circumstances you could. If you're young and have zero responsibilities, that's a good start. If you're not looking to be uber rich and are ok living a modest comfortable life, then that's another good factor. If you have supportive parents or friends, that's another good thing. If you can get like a part time job, room with a few guys so you can have super cheap rent, or just live with your parents rent free, then you're good.
But a big deal is what do you want to do with your life? Teach? Open your own gym? Cuz eventually you'll get older and want a family. And families are costly. Unless you get a sugar momma....or sugar daddy. I'm not here to judge.

And so you're gonna have to figure out how to turn that eventual black belt into some sort of income. I'd recommend taking some business courses or learn the ropes from a current business owner in whichever venture you choose.
Honestly, if I were young and had no responsibilities, I'd try to figure out a way to focus on BJJ. It's the one thing that I feel makes me happiest besides family and friends. So why not? At least give it some thought and see if it's possible. Right?