Can you have just a drummer and vocals/keyboard in a band. Please tell me if you can and how we can become BIG

Answer 1

Skim : according to "Music " players that whom are "Instramental
Decline they would require
1Sound Stage
2 Electric Amphires & Acostic Guitars
3 Light fixures
4 rehearsal schedule
5 Drummer & Music Sheets
6 expert piano player
then also a Manager ok?

Answer 2

No, that's not a band, it's actually called a "Duo" , Like The White Stripes - i don't care what people say , it's just two people....not a band. As for your project , give it a try , you never know what can happen.