No not possible the vast ness of syllabus is to a very high extent and one should not opt for such dangerous thing .
Only revision of neet pg can be done in that much time
Still if are willing to get descent score to please ur family I suggest u to solve previous years as much time as u can
Dont just solve and sit . For e.g a question is there of orthopaedics then read only that topic to which question is related and dont waste time on other topics
Finish this much work in 20days
Now the left 10 days revisewhat u havestudied in this 20days .
U r work will get done