I thought people actually came to the RPF to win time & minimize investment... I'm saying this because I'm also somewhat of a newbie and it can be hard to find good pieces right away. I appreciate the "go the distance" attitude but I find it counter productive to always draw that card by default when people ask something.
Anyway, I wish you lots of good luck with this costume and I hope you still get the help you require! I don't have any experience with Deathstroke, unfortunately!
Alot of the stuff in the photo can be made by a good sewing shop with orange fabric and leather, though. The mask you should be able to get here somewhere by searching the forum (there are a few Deathstrokes around here).
I am also new to cosplay. I am also working on a deathstroke costume. All I've done is research on youtube to see how other people start their projects and their steps. I have a couple of pieces already done for the deathstroke but not to happy with them so I am probably going to start over. I'll post the pics and let me know what you guys think.