lets say I get 6 x 290/390 on good price thats 150-60 mh/s on current rate(249$) and difficulty my profit will be 575$ without the electricity bill which I'm not paying

This doesn't account for future difficulty increases. The profit on ether is roughly half of what it was two weeks ago. It will probably get cut in half again or worse, and that 4 month breakeven becomes 8 months or 16 months, is it worth it then? There are tons of new people everyday on here, that is why everyone is making fun of you for not doing the research about asics.