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1. What is the best Bitcoin hardware mining solution on the market today? and most cost effective?
Best hardware is the one that works. Cost efficiency is determined by Th/s per vs Watt and $ spent.
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2. If you had your electricity subsidized and only paid .03 cents, hardware solution you would use?
Still the highest Hashrate per Watt (th/s / W) is what you are looking for.
Antminer S9 14.0TH is one of the best readily available solutions.
Too bad you can't really buy it because of the huge demand. I mean you sure can buy it, but will pay 3-4 times the original price.
Someone may argue that even paying higher price and starting to mine right now is approximately the same as waiting for original Manufacturer releasing new batch.
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3. Would you consider farming out mining via a cloud solution?
Owning your equipment is always the best. You have FULL control. Cloud is usually a scam
