Thats it you have hit the nail on the head, not knowing, its a bitch.... so find out? Please? youre twisting yourself up into knots here.
Hey, whats the worst thing that can happen??? If the IP throws a wobbly, calmly say, I am really sorry but a, b and c? Are you going to fail my arrangement? Are you going to make it impossible for me to afford to do my job? If they do, you go for option B a DMP? Why not ring a couple of DMP companies to see whats involved? That way are blowing away at least one wall? Knowledge will help you not to fear the unknown as it wont be unknown amymore. I feel for you, I really do... Its not a nice place to be where you are, feeling like you have failed..... twice...... Please try to believe that this is not the case, it can be solved.
Make that call.....
Good luck to you Ryan.