I have 2 tents, a 2 by 2 and a 2.5 by 2.5. I like to grow big plants in those, I used to use 5 gallon buckets, but in late flower the roots would grow to the size of the bucket and EC would wildly swing overnight because of this.

took a cheap Storage tote fit for my purpose, cost around 15$

The radiator foil isn't too expensive at a hardware store, it helps insulate and make the tote more opaque

The netpot is fairly standard and will cost you like a dollar at the hydroponics store, same for the hozelock Airstone

The hydroponic fittings to make the dripper ring and level indicator are like 10-15 bucks, you could also opt for a GHE Waterfarm Kit, which has all the tools you need for a dripper ring setup for around 25$