Mahmood,
Make sure you limit heat generation since your stuff is in the model, it would be embarrassing if you caused the model to catch fire. I would consider making the main radiator (the power supply) external to the model. Also, With 1000 lights on you have 180A and using devices with a Vcesat of 0.5V, that alone generates 90 Watts of heat. Maybe you should consider to equip your 'electronics cavity' with a fan.

Erik