Interesting! Hydroponics is usually deployed indoors where there is control over the environment so I guess an external system may lose more water and need adapting to cope with direct sun as well as other local factors?
Agricultural co-operatives are a common way to share costs and benefits of capital intensive storage and processing beyond the financial means of any individual farmer. They may also attract 'cheap' funding and can scale quickly to have a real impact. Might be worth considering?