A small mixing board, if you can get one that records multiple tracks at the same time that's great. Microphones for vocals and if it's small maybe a few room mics to capture around. Maybe 1 or 2 mics on the drums to get the range. A decent computer, mixing software, monitors. A thousand bucks would do a decent small studio for like indie stuff. You can direct instruments into the board and use fx on the computer, or mic the amp and go from there. I'm sure YouTube has a bunch of tips also.