The imminent death of home mining will soon be the death of pool mining. The real threat is the continued rise and dominance of ASIC manufacturer's massive mining operations.
you are close to the truth.
a home miner with a 200amp power box can run ½ for mining or 100amps. or 12000 watts safety calls for about 10,000 watts.
this is about 25-30 s-3's or 12-14th
lets says this home miner goes state of the art all sp35's they do 5.5 th he can run 3 or 16.5th use 11k watts
so the 'normal' home miner in the USA is capped at 16.5th
I know a forum member with solar buyer he can do 19 kwatts safely so 5 sp35's or 27.5th at todays numbers 27.5th earns .345 btc a day about 10 a month about 3700 usd.
It is not much.
so if I max out I go to 1750 a month before power cost
if my solar buddy maxes he goes to 3700 a month before power cost.
In either case I do not count setup cost. So pool mining or asic mining destroying bitcoin meh. neither will destroy it. but all this shit morphs it like silly putty.