I know this is an old thread but was wondering if anyone built one of these as I am I the process of building a 2400 plant with 600 seedling area (for 3000 total) system using a 12 by 46 storage garage. One of those portable ones sold at farm places or for construction offices. The one I am using is cute as it has a 4 ft front porch attached and a garage door on the side. Current costs are 6k for the cute building 3k for grow lighting and 2k for materials for hydroponic system using PVC downspouts and wooden support structures and basic fountain pumps. The only cost I do not have is solar panels and battery storage. Has anyone built one of these yet to know estimated costs. Trying to keep total cost under 15k. But it will produce 600 harvested leafy crops a week or 85 a day. Will be adding to the side wall outside a tuber system for potatoes carrots later for soil growth items.

To make a short question long wondering if anyone has built onesie willing to share costs?