S9s will be mining at a loss around June. Roi is approaching never very quickly at current btc prices.
There are places in the world with cheap power. Hell even the USA has places with power under .05/kwh
Even with free electric they will be returning nearly nothing. You will never roi. Buying one now at retail prices would probably take well over a year. Currently around 12-14 months without even factoring diff adjustments that are sure to come. Probably closer to two years plus to roi.
Aaah the ignorance of youth and uninformed...