VR technology coupled with drones could address most of the problems. You could potentially gather resources you needed from the surface of venus itself using drones that people in the habitats control via VR interfaces.

EDIT: I did think of a problem... sure you could do this on the surface. The problem is dealing with the escape velocity requirements and pressures and such to get the resources back up to the habitats. You could consider a space elevator type setup, but it turns out the cable requirements for that make that a tough thing to consider. Buckballs and carbon nano fibers are getting us closer to that possibly becoming a reality. Yet it is not as easy as it seems.

So VR and drones could only solve part of the problem..... hmmmm Oxygen as a lifting gas... could it get our drones to the habitat level?