Why was the narrator’s father not happy about the Captain’s extended stay at the inn?

Jim Hawkin's father and owner of the Admiral Benbow Inn certainly is not fond of Billy Bones, aka "The Captain." It probably does not help that Mr. Hawkins is in poor health, meaning that his son, Jim, is picking up the slack around the inn. Billy Bones is certainly not a model guest. His clothes are bad and his language foul. He is extremely anti-social, which would have been frowned upon in a public space, such as an 18th Century English inn. He sang loud sea shanties without a care for the other guests and would subject them to terrifying tales of the sea. Furthermore, Billy Bones is almost constantly drunk. He also stops paying for his accommodations after a time, even though he stays at the inn for several months. When Jim's father would bring up the issue of payment with Billy Bones, the guest would intimidate the innkeeper into leaving him be. We can easily suppose that all these things meant that Jim's father was not at all happy to host the Captain at the inn.