This is the 3651st most frequent Korean word.
부족하고
"부족하고" means "lacking and" or "insufficient and."
The word "부족하고" is used here to mean "lacking" or "insufficient" in the context of time, and it connects the idea of lack with the statement about having many tasks left.
나는 시간이 부족하고 아직 할 일이 많아.
I lack time, and I still have a lot to do.
Here, "부족하고" expresses a shortage of experience, leading to the consequence of difficulty in leadership.
그는 경험이 부족하고 그래서 지도자가 되기 어렵다.
He lacks experience, and therefore it is difficult for him to become a leader.
In this example, "부족하고" conveys a deficiency in manpower, and it ties into the additional need for equipment.