https://www.rollitup.org/grow-room-design-setup/245654-grow-tent-600w-hps-hydro.html
That's a link to my journal thus far.
I have a 4'x4' tent 600w light with digital ballast and a simple flood and drain hydroponic system. I have a 6" valueline fan and a 435cfm carbon filter.
Only things I would change about what I have is I would get a better quality tent than what I did, and get a lightweight carbon filter that can handle a high cfm.
Read my journal and you can see how I went about putting things together. I removed pictures lately, but you can read about what I have. Total setup cost was around $1,500 and that is with buying some things used off of craigslist.
I got a great deal on there for the hood and ballast, top notch stuff for a fraction of the cost, just make sure you deal in person with someone a couple towns over.