Honestly I would say at your weight brother, the DNP isn't really needed. Unless you have some major thyroid issues inhibiting you from losing weight naturally. For the overweight, caloric decreases and cardio will shed tons of weight as long as you stay strict on your diet. If your goal is to get down to a manageable size, I wouldn't run DNP until youre under the 300lb mark. If you experience any sort of blood sugar issues, you would be feelin like you were dying from glucose starvation on DNP. And it causes immense carbohydrate cravings which can be pretty hard to resist. All in all, a strict diet, weight training, and cardio will benefit you the most for a good while. I wouldn't rule it out completely, youll get to a point to where the weight loss slows down just like it does for everyone else. Then you start to throw in compounds like DNP.
To be fair, I could lose the weight I've lost naturally without using DNP at all. Fact is I got kind of lazy this winter on my bulk and I'm paying for it now by sweating my balls off and feeling tired as hell every day using DNP to undo what I did. I'm not saying you shouldn't use DNP because you couldn't handle it, I just think at your weight it should come off like crazy for a good while if you have everything under control.
On top of it all, most users report the best results with DNP on their first run. Thats why I'd wait. The first run, if you do it right, is pretty epic.