As I have said before, you are free to believe in whatever you want.
Lots of people have lost money trying to get into commercial operations. It is very sad to hear of folks losing their life savings after they invest and get scammed by a shady light vendor.
dude stop trolling the thread. seriously you're an idiot every post proves our point furthur.
While I do not agree with many of FUD's posts, I agree with this. I have seen MANY commercial operations never get off the ground only to have millions dumped into them. I know of one that did 1 grow then had major issues and it took damn near a year to get a 2nd crop out after hundreds of thousands of dollars.
I know of another facility that was supposed to be running in May and is still having issues. It may be sold to a new owner soon enough it is so bad. When you expect to have stuff running in May and crops as soon as Sept. ready for harvest, that is a killer (especially considering this facility is 2 buildings with roughly 250'x80' each of FLOWERING space).
If you are looking to do a grow this size, I would highly suggest that you look into having a licensed electrician do the work for you. That said, here are a few tips after seeing many of these commercial facilities built/in action.
Multiple rooms! Do NOT utilize 1 large flowering space. While this will incur more cost, it can save you money in the long run. I know you mentioned running at different times to save on cooling possibly, but that is not realistic. And depending upon where you live, electricity can have an up charge during peak usage hours negating the savings.
Be sure you have working space! This is HUGE! You will need to defoliate and tend to the plants no matter your setup. I have seen COMMERCIAL facilities pack so much in that they cannot access and lose part of their crop.
Dehumidifiers!!! You will need dehu units so keep that in mind. With a 100'x50' area, you will want everything done remotely so do not cheap out on cheap AC units/dehus. You want to be able to control them from 1 central (or multiple) controllers (like 1 for each room, or whatever you choose).
Pulley systems for your lights! You want to be able to move them up and down. Pulley system is the easiest way and will save you a lot of headache.
If you are doing this unlicensed and under the radar, i wouldnt worry about inspections. That said, I would find a quality electrician still to hook things up. Dont worry, plenty of them have their own things going on and can be trusted
KEEP THE SMELL DOWN!!! You dont want people smelling what you have going. Invest in the proper filtration. Seal your rooms and be sure you have a 2 door system access. Enter one door, close behind you, enter another. Have a scrubber in between the 2. It is costly and many overlook this, but its worth it.
Personally, if you do not have the knowledge or skill set to build all these lights yourself, I would just go with some Gavita's. Fairly efficient and much more cost effective. To have a builder build you 50%+ efficient cob lighting is going to cost a fortune, especially at some of the prices these guys charge. If you arent getting at least 50% efficiency from your cobs (I would say that 55%+ to be a better number honestly), then I would not invest in them over the DE Gavita setup for something this size (at least not yet).