Borrowing to buy something that earns is very different from borrowing to cover something that already happened. The first is leverage. The second is a warning sign.
Ask three questions: what does this money buy, when does that purchase start paying for itself, and what happens if it takes twice as long as planned?
If you can answer all three without flinching, financing is probably the right call. If the third one makes you uneasy, fix the underlying cash-flow problem first.