I charge per question
Again school specific. It would a be a crapshoot. You have the additional issue that at least 80% of applicants per individual school must be be rejected pre interview this becomes a negative process. That is they look for ways to reject you like an out of date MCAT.
Again, school specific. But if you are asking to apply already being obvious that you would have to defer, I would be loathe to admit. adcom's job is to fill seats for this year
That would raise questions on commitment and motivation. If you were committed to finish a PhD you started, how do I know you will be committed to completing the 7 years minimum of training to be a physician.
Most applicants rely on the optimistic hopes of how an adcom will react and I always try to show the pessimistic worst. If you want to apply to medical school then do so. If you want to finish PhD then do so. If all this is because you cant be bothered to retake an MCAT, I think its ridiculous