Have you ever seen a fish tank with an air stone bubbling away ? If so , then you have seen one. They come in many different shapes and sizes. Buckets are just easy to find and use. Most do one plant der bucket. 10 or 20 gallon tubs can handle many more.

It depends on your room and how tall and the light.

Tell us what you can afford in the way of lights and things and room.

When you do a bubbler, you place a netpot ( look them up ) in the lid of the bucket. Place an air stone in bucket. Bring water level just to the bottom of the Netpot. The idea is for the air bubbles to splash the netpot. Never let the netpot sit in water (unless EBB and Flow). partly fill the netpot with hydrtron rocks or lava rocks. Place rooted clone or seedling in and fill the rest of the way. Place in bubbler. Mix your nutes and away you go. to start you may have to hand water with water from the bucket untill the roots start to hang in the water.

Did I say keep the PH from 5.2 to 5.8. This is what the PH gods say. Do not stay from the PH path or certain DOOM will avail you.