Multifamily Aluminum Wiring

[David Benton]

Does anyone have experience dealing with the apartment complexes built in 1970s with aluminum wire? 

One question is the resale issues anticipated and how the aluminum wiring affects desirability/marketability and value.

Another question is what is the rough cost per unit (approx 1000sf) to rewire with copper wire? I know this is a question for an electrician but thought I would post for someone who's done this. This is 120 units with all aluminum wire.