Tents can be had on craigslist and the like from $100 on up.  Ebay too I'd imagine.  Brand new they're $250+ last I knew.  The same concept could be accomplished with some 2x4s and some visqueen plastic + a staple gun and duct tape for the budget-minded, but I'm not a big fan of having wood around this kind of amperage.  The tents are somewhat fire-retardant (designed to be used with 1000W sun lamps running 12-24 hours a day) and the frame is steel poles.  They also have lots of different openings/ports at varying heights.  The one I have was used many years ago when I had a garden to start tomato plants in the spring, but it's been collecting dust for almost 4 years and I thought this would be a great way to get some use out of it.  I'll post pics when I get around to assembling everything.

I did find some OC numbers my EVGA 1070s like and run stable at: -200/1100, ~29.1 MH/sec ETH.  

Thanks again for everything.  Really looking forward to v0016!