Yeah, you would need to first be able to get to the other side to build an endpoint.
The other thing is, these sort of systems aren't designed to hold lots of weight (the tanks probably weigh many tons).
And then there is a maintenance issue. The steel cables don't last forever and would need to be replaced every so often (I suppose this part could be left out of the game since maintenance would need to be done on everything, especially on a Venus like planet).
Also, why would a section of cable have a power requirement? the only thing that needs power is the station at the end (so it can drive the cable and so on).