Bathtub Repair Question

[Mary Winter]

Hello BP community! I have another bathtub question. Here is a picture of the tub. This a one piece fiberglass bathtub. There is a small hole in the bottom of the bathtub (dark spot in the picture). This is causing water leaks. The repair guy is suggesting to replace the flooring of the bathtub because patches would crack in a week or two. Can this be done for a one piece bathtub? 

Any advice you can provide would be greatly appreciated!