In my humble opinion, 10 month ROI isnt really that good if you consider that the equipments are on very fast depreciation schedule.

The ROI isnt as persistent as other types of investments, primary because mining causes standard computer parts to fail prematurely.

My X79 still runs fine after 8 years of service becase I only do web browsing with it, but...

The video cards in a mining rig may die in 1-2 years or less due to heavy cryptomining and/or faulty riser boards. tbh, I'm having some doubts about getting into mining.... jumped in when ROI was about 6 months.