New Here! How do I know when to close my listing and hire instead?

@woodsandwater, welcome to the world of housesitting.

As @HappyDeb noted, suggest add your THS listing to your THS Forum profile (weblink below).
The Christmas period is a time of material excess demand for housesitters. Listings vary dramatically in their attractiveness to housesitters, and on the sheer quality of the photos and information in the listing. Suggest invest time & effort to make your listing shine - use magnifying glass at top screen to search past THS Forum posts on top tips for great listings.
Consider one or more short listings, say a weekend, ASAP to establish initial reviews. They help initiate trust before peak Christmas period.

There is never a bad time to create a Plan B.