Indoor grow set up

Im looking the build my first indoor grow (grew outside past season) and looking to go hydro dwc. I went and obtained a product catalog from local grow shop with pages upon pages of products im sure i dont need. I'm trying to keep building/ operating cost as low as possible so i know i wont be supplementing any c02. But so far i have got this on my checklist. 1.seeds (of course) 2. Lights (hps) 3. Timer 4. Light hanger 5.nutrients 6. Grow medium ....is there anything else that is a absolute must that im missing? Im sure i dont need any light rails and other crap they trying to sale because its not that size of a grow, just 10 plants max. Any suggestions?

exhaust would help some thing to control ph, a fan, basics good luck

Ph meter, ppm meter, air pump, air stones, black tubing, black buckets and tops with net pots. Just google(or youtube) DWC and research it, not that hard. One of the things that most first time DWC growers underestimate is controlling your nutrient temp. which should be around 68 degrees.