I know I might be late into the mining game, but I would really like to get into it, since I have been researching so much about it lately.

Problem is that my GPU of choice(RX580), I could not find much info about whether to buy them now is a good option or not.

The deal breaker for me are the following -

1 - Already I am late at the game, so buying these GPUs, according to my calculation if I buy 20, it would take atleast 1.7 years to break even on hardware after elec costs(if I only mine Ether). Now, by then I guess these GPUs will be less efficient sinse newer cards are coming out thsi year.

I am very confused about what to do regarding this. Also maybe another factor contributing to this confusion is, how long should I plan on running these GPUs before upgrade?