I love the idea, but as a fairly well-off hobby farmer myself, there is no way I would spend that much on this product.
I bought 1 mile of drip tape for $150 off of https://www.berryhilldrip.com
Solar panels are a cheap commodity. There are charge controllers which will only turn on the DC if you're over a certain voltage for the pump.
Again, I love the idea, but its way off on execution at this point.