That thing will need some safety rails! I think @Eleusis La Arwall's Keridian Dynamics parts would make on-base construction practical and slick. Now, could we mine Eve's atmosphere for materials? I'm reminded of @BobCat's atmospheric mining station. As a Venus analogue, CO2 to ethanol is actually realistic: http://www.wired.co.uk/article/carbon-dioxide-ethanol-reaction Carbon, oxygen and carbon monoxide are also doable: http://science.energy.gov/bes/highlights/2012/bes-2012-12-b/