I’m just seeing this, the notifications are really confusing. I think organic is much simpler. It costs up front, kinda like led lighting. Chunky up front investment to get going, but if cared for & done right it can last forever. You can keep reusing the same soil. Unfortunately I’m not on that level yet. I have only done 1 run. I have yet to dump & re amend the soil.
Anything that you can sit your plants on where water can drain through. Those Pepsi things look perfect as long as it allows you to sit it inside the walls of a tray. They may call for a bigger tray, but it will keep them elevated so oxygen can flow, and you pot will dry out more evenly with air getting at the bottom. If watering with synthetic nutrients, this will keep your pot from sitting in run off.