Sure thing, let’s keep it tight and useful. First, line the balcony roof with a bit of gutter or a simple catch‑board made from a 4‑inch wide plywood strip. Run that into a 5‑gal bucket or a small barrel; add a screen over the inlet to keep leaves out. Drop a first‑flush diverter—just a short pipe that’s blocked for the first few liters and then opens so the dirty start of the rain doesn’t get stored. Below the barrel put a sand filter or a few layers of charcoal and gravel to keep the water clear. Then tie a 1‑inch PVC pipe to the barrel’s outlet, attach a tap, and run that to your plants or to a drip line if you want a bit more control. Keep everything capped when not in use, and you’ll have a tidy, reliable rainwater system that takes only a few hours to set up. Good luck, and remember to check the barrel for cracks every season.