Way waaaay too much. No need to buy packages of crap from hydro shops. 95% of what you need to do hydro is available from a hardware store, including high-pressure sodium (HPS) lights.

A flood system is cheapest and easiest to set up. The only thing you really need from the hydro shop is the nutrient solutions- but more experienced growers can even make up their own.

Flood trays can be either tailor-made, moulded plastic sorts from the hydro shop or you can gin up your own out of 2x4's, plywood, plastic sheeting and some PVC tubing & fittings.

HPS security lights from the hardware store will do fine. You can also get horticultural HPS lamps (these have some added blue light) from the hardware store, but the security grade HPS will work fine for flowering.

Water and air pumps can come from an aquarium shop, usually much more cheaply than from the hydro shop- and they are the very same pumps. Many hardware stores have aquarium pumps sold for garden water features.

Lawn irrigation and garden hose parts from the hardware can be used to make the simplest or fanciest hydro system you like. My system has a valved drain system so I need only twist a couple of knobs and turn on the pumps to drain my tanks.

Don't be 'sold' by your hydro shop. While they may be convenient and have all your stuff in one place, they are not the one-and-only source for growing gear as many of their salesmen will have you think.