LED lighting is taking a huge legal fight right now. So finding good LEDs is impossible. Solaris is gone and only imported lights can be sold. Not a good time to buy LED, even if you had the 15-30k for that much light...
Go to oregonreef.com and look at his water movement and waterchange schedule.
The cost of running pumps is directly related to your electrical cost
You can figure $300 a month as a good starting point on electricity depending on where you live. it goes up from there. I figured it cost about $400 a month to just keep my 450 running. It costs me $130 a month to keep my current 300-gallon running (electric, salt and other supplements).