Agreed.  The best mining infrastructure still has a 15 month ROI.  Of course, thereafter it's perpetuity, but how much longer?  Depends on how hard you are overclocking your cards and air temperature with circulation environment.  Otherwise, worst case scenario if someone doesn't know what to do, they should receive their returns in 26 months.  In this market, there's better profits with just investing in Top 10 of the coins market where someone will yield returns for doing literally nothing in a 12 month period.  If you have an appetite to further risk your funds, study and review ICO's.  More money to be made then mining.