I disagree. You are too late in the game.
L3+ is profitable until March 2018
and it does not ROI in time once
you get them, not worth the investment
The ROI will take a long time with these, that is sure. Maybe even 2 years.
Why do you think they are "not profitable in March" anymore ?
To have that scenario happen, the market would have to be flooded waaay more than it is.