[mcbits]

Venus has very little water, so a starting point would be to launch large solar-powered balloons that just float around and collect water by cracking the sulfuric acid in the clouds. Living systems also require a lot of trace minerals that would have to be harvested from the surface. I think it could all be done, but probably not for a price that anyone is willing to pay.

[Symmetry]

At 50km where the temperature and pressure are nearly Earthlike you've got about 25 ppm of water. Which is rather dry but not so much that it would be unprecedented on Earth. The concentration of sulfuric acid is around half that so it makes more sense to extract the water directly like so:

http://selenianboondocks.com/2013/12/venus-isru-condenseable...