1 miner? Yes, it is too late, it ll bring you next to nothing. Go cloud or go PoS. I like Hashnest and DMD Diamond coin.
why must you write in absolute terms?
3x s-3 right now = 240 + 100 for a server psu.
340 usd . set three for 1200 gh and 950 watts
you have your money back in 175 days after 1 year you make 305 usd
now if you had a psu on hand you have you money back in 114 days. after 1 year you make 405 usd
the above is true if your power is 2.4 cents a kwatt
if you are free power you did 3 s-3s for 240 your money is back in 85 days and you make about 655 in 1year.
Now most of us do not have cheap power like 0 cents or 2.4 cents a kwatt. but some do.
At least say if your power is under 6 or 7 or 8 cents you have a chance
If you power is 5 or 4 or 3 cents a kwatt or better free you almost certainly will earn money.
Once you get over 10 cents making money is hard.