$180K is possible indeed. However very hard to answer the question when we don't know how much capital you are working with. You have given us your holdings, however I am assuming you didn't buy at current prices, so to work this out is near impossible. In terms of my own personal view, and this is my view only I think FDL and GDA still have some serious movement left in them. I suspect that when FMG start drilling mid year, it is really going to put huge focus on the Pilbara region. Also FDL will soon come out with their drilling strategy, along with GDA there IO findings... All in all don't lose sleep over current movements, another stock I would put on your radar is SBN formally HGR, currently low 4c, this has the potential to be massive.
Oh and good luck making $180K...
FDL
flinders diamonds limited
