Hello. Newbie here.

I have lurked as much as I can and tried to grasp as much as I can. Would someone be willing to explain to me what the easiest way to identify what is as close to profitable investment in terms of BTC:GH in equipment.

If not, what are the exact factors that I must consider? I am aware of the mining calculators. I just need to work out how I find out whether equipment will get near an ROI based on its current price vs the bitcoin price and future difficulty. This is something I am struggling with.

Thanks!