looks a bit crazy to me,
easy cheap option here, this is so easy and so cheap to make.
first off what you need is some containers, large plastic ones that sit inside each other or turn one around and they stack.
get yourself a water pump and the correct hose to fit
make a 2 holes in the top tray, 1 just big enough to get the hose through, the other one needs to be half the size.
fill the bottom tray with nute solution put your pump and hose together so the hose just pops thru the hole but the pump sits on the bottom, stack the tray with the holes in on top of the nute tray and you got yourself a flood and drain system, your going to need just rockwool cubes for a medium and you could use some expanded clay pebbles such as hydroton.
total cost of the system,
containers 5 each = 10
pump 20
rockwool 4 inch cubes 0.5 each
hydroton 12 for a 50 litre sack
total cost 42 plus rockwool