I mine less coins a day, but it's 100% profit.
You failed with this quote. While solar power is free you still have to invest on the hardware which is very blood expensive and already proven that solar power even with the minimum cost at all fronts still cost more than 0.07 cents per kwh.
12x Vega 56 Rig = 24KHs cryptonight = 500MHs ETH / 1800W = 120€ electricity month (10cents/kwh)
6x Vega 7 = maybe 24KHs cryptonight = +-600MHs ETH / +-900W?! = 60€ electricity month (10cents/kwh)
prices
sell 12x Vega 56 = 2700€
buy 6x Vega 7 = 4500€
------------------------------------
switch to vega 7 = 1800€
60€ less electricity / month = 30 months to equal
mhhhhhh.....
So, can you really sell each vega for 350 dollars? I myself would never pay that much for it, in my book vega 14nm is worth only $200.