I stood up a 4x R9 280 rig yesterday.  Took about $1900 in parts and a couple hours work but I admit I have a pretty decent knowledge of PC building.  Without any real tweaks I'm hashing away at ~2800.  So less than $1 a hash.  You guys are asking basically double that plus the hosting and management fees and it's not coming online for a few weeks as the LTC difficulty really begins to soar over the next couple months.  I think that you will struggle to ROI on this.  Yes the hardware resale might ultimately push it into profitability but that's going to be a long road.  I am not saying they won't do a great job with managing this as they do a great job with all their GBs but it just might not make financial sense.