If you are saying $3 per day with 1 graphics card then I must say that your are the greatest liar ever, not even with 1 x gtx 1080 ti
1080 ti DOES in fact make very close to $3 a day on some coins currently - even with the big dump - it's just not CONSISTANTLY doing so the last 3 days.
On the other hand, the days of "2-3 month ROI on gear" are gone, and unlikely to return anytime soon IF at all.
It would take a major VERY SHORT TIMEFRAME big price jump (much like Feb/March timeframe THIS year) to manage that - or it would take a major price DUMP for quite a while to convince most miners to get out, then sometime AFTER that a big price jump.
People got SPOILED the last few months with the crazy VERY ABNORMAL level of profitability.