Re: low voltage lighting/dimmer panel
Sounds liek this is outside what you normally do. I would suggest contacting your local Lutron rep and sending them what plans and specs you have. They will provide layouts, quotes, cutsheets, etc for your engineer or lighting designer for their aproval. Unless you've done a few smaller setups like this or have experience with theatrical type systems, you will probably miss some stuff in your orignial quote/bid, and have to eat the cost.
Lutron, and others, also have a factory commisioning type of service that can come out and program the system. Sometimes they require it so that you can have the full warranty.
mike