It doesn't have to be over, but good business practice suggests that when the elevator door opens - we check that the elevator is actually there before stepping forward. Such is the case with deciding to buy new equipment. We should already have confirmed bookings that will help us pay for it.
I just had 2 new 70" screens, and 2 heavy duty rolling stands delivered today. I haven't actually paid for any of it yet, and I will use them on Wednesday for an event from which the entire cost will be recovered. That event requires a total of 8 screens. The gear itself is on a fixed payment schedule for the next year, so I'll be using them to create income well in excess of the 12 payments to be made in the future.
Today, I also booked two prior inquiries for a Saturday next month which combined will require from 4 to 7 screens, and another event that same month that is potentially a candidate for some screens as well. The point is - I waited for the elevator door to open, and verified that the elevator floor had indeed arrived before I took that crucial next step.
You should be operating in similar fashion.