As a breeder - my priorities are : Make sure the last pup is out, that the placentas are accounted for; put clean bedding (newspaper for the first couple of days) in the bed box; pour a gin and tonic for me; PHONE THE PUPPY PEOPLE !
Obviously there are odds and ends to do along the way - but telling the owners their puppy is safely whelped is very important. I start taking photos and making sure all the new people feel involved, especially if it is to be their first Basenji. They are encouraged to visit as soon as eyes are open and Mom is getting jaded enough to accept visitors.
I'd be worried too, if I hadn't heard - and, btw, I've never taken a deposit. Price is agreed and payment made when the pup if handed over.