My apology, I really unable to calculate/approximate the electric charge for you. The charge will depend on your usage. and the hanging must send us for checking the structure with weight dimension first. If approved I’ll send prices for utilize air space. Lastly we have service FEE for contractor and the performance bond as well as a damage deposit by company cheque and shall return to you after event should there be no damage found In case the damage found, there will be a deduction for services and damage.