20
... as noted previously, we can arrange a lease with low monthly payments designed to stay within your operating budget.
while i understand this is a major undertaking for us, i would advise you time is of the essence.

에서 time is of the essence ?? is라는 be 동사뒤에 전치사 of가 올수 있는건가요 ????
찾아보니깐 time is of the essence가 저 지금 바빠요 .라는 뜻이라는데, 그럼 여기에서는 해석을 어떻게 하나요 ??
친절한 설명 부탁드립니다.