Ventilation question...

So my next investment is going to be ventilation for my 4X4 room with a 600hps. To be honest I'm not really even sure where to begin. I am on a budget but am willing to go as high as $200 for the whole setup. Should this be sufficient? Any input on where to begin would be helpful. Thanks RUI!

To be honest man, it's very difficult to stay within a specific budget, especially if it comes down to necessities like ventilation and lighting. I would assume a HO 6" fan would suffice, but I don't know for sure, since I personally don't use a system that big.

And that is, of course, just to ventilate it, to cool the heat, is another story