I think that is wrong. That is not right. You delay the prayer but give time for the charity sponsor. Isn't it pray is the obligatory rather than charity... Moreover isn't it we can die at anytime? What if someone can die during his/her prayer but because of the delay, the person die out of that prayer? By the way, you want to do charity....you delay the prayer. Isn't it Allah is the one who controls everything? The point is if you certain Allah controls everything then why you delay the one that Allah loves most? *That point is supposed to myself first and foremost since I am struggling* Don't get wrong.... The initiative for that charity is noble & good. Only the delay part because of it .