Doesn't it make more sense to buy an RX 470, mine 0.003 BTC per day with it. Pretty much equavalient to a 3TH/s miner but its efficency is 0.05W/GHS.
Keep that BTC like you normally would for "long term" while getting ROI in 3x as fast and having something that in 1 year will be resellable.
But you can't mine 0.003BTC per day with it. You mine something else and then exchange it for BTC. Good in that BTC gets used (the more its value is based on currency utility versus asset investment, the better) but in the end someone's paying an inflated price for a coin that stands a much better chance of being worthless in six months than just mining BTC. Some call it gambling, some call it theft.
How are these miners controlled?
Looks like they'll be run like Avalon4 and Avalon6 were, where multiple modules are chained together to a single RPi controller. The single-point failure part isn't so great, but since it's an off-the-shelf part replacement is super easy. Setup and configuration are also super easy because you don't have to track down IPs for every individual machine. Overall a pretty good setup.