(and more bands if you want), and then you can try to
sell them cheap when the concert is over.
At least that worked for me.
I dont think you will be instant rich that way,
(well I wasnt anyway)
but more people will know who you are and what you sound like, and then probably go to more of your concerts.
One thing that is nice about doing this, is that it feels
damn good when somebody is willing to spend money on your music.
If you want to be instant rich and famous, I suggest taking
the record to a record-company.