Where are you getting $10,000 in economic costs per year exactly?  You do realize that those protected under DACA have been in the country for a while and we already invested in them.  Why through them out.  Many of whom were brought here at a very young age by their parents.  

You make it into an economic issue (with false costs to support your argument) but in the end it is also an ethical and moral question.  Which side of history do you want to be a part of?  

Simply put, allowing a path to citizenship for these young men and women is the right thing to do.  When it comes to this group it should seem so simple.