I think that doing chest twice a week is fine. I workout all my body parts m-w with thursday off and Friday is do whatever I feel like focusing on (chest, bicep, shoulder) whatever I feel like needs improving.
With that said, doing 3 sets of 25-30 reps is not ideal man. Just push heavy and max out at 15 rep at most but I'd suggest going only 12 if you really want to rep. That many rep is just not pratical man. When i am done with my chest routine, I can barely do a push-up or not even be able to do one. My body is drained but I do not exceed more thatn 10 reps unless I am messing around to see how many I can press at 135 lbs after I am done (about 30ish) but that is done once every blue moon.
Keep the weight heavy and you can do tons of push-ups as you develop more muscle. Best way to develop muscle is going heavy weight not reps.