The water, while scarce as part of the whole atmosphere, is concentrated within the sulphuric acid clouds (25% by volume). So if you can float a balloon with a

The water, while scarce as part of the whole atmosphere, is concentrated within the sulphuric acid clouds (25% by volume). So if you can float a balloon with a pump at that altitude, you should be able to get water fast enough. Human or robotic explorers should be very safe in the cloud deck, with low ambient pressure and temperature. You may even be able to dissociate the hydrogen from the acid itself.