Well if you want something more powerful than your Ant, $130 would be not really enough ...
you will not be able to build up any rig for $130..
Do you mine Bitcoins for fun or you want some profit?
if you want profits - $3000 and you can think about a little profit

after few month.
At first it was for fun, but at this point I would really like some profit. I can't imagine having 3k to spend anytime soon O.O