Data centers do use a lot of water on average. Warmer climate data centers often use evaporative cooling and can run through millions of gallons of water to offload heat. Google's data centers combined chewed through some 6 billion gallons of water last year.
Closed systems are much more water-efficient, and are more common in cooler climates.
I am building in the mortgage origination space and have these sorts of enhancements on the drawing board... you hit the nail on the head that the bottleneck will be in QC and legal review, as 3rd-parties (especially regulators) may want to manually see the data you used to reach the conclusions you did. Although I'm still digging. You'd be interested in what we're creating btw, it's a crypto-based mechanism that enables instant digital mortgage origination, we should chat!