I'd try to keep it simple if you're on limited funds you can use a closet, $1 reflective window visors from dollar tree to cover your walls, a few pots, a big bag of potting soil, a timer, your lights and a fan and a box of miracle grow(to start with anyway) so your should be able to do this for under $100. As I've posted before a friend used a moving box wrapped in tin foil and about a half dozen round 22W flourescent lights and grew a few nice plants and didn't even notice a jump in his electric bill.