Before they are spayed and neutered, the cats live in a kennel in the evening that is an exact replica of the Hemingway house, right down to the yellow shutters. Once they have one litter, they are spayed and neutered.
The house goes through two tons of dry cat food a year, about 60-80 pounds a week. There are nine food and water stations on the property, and they are refreshed every eight to 12 hours.
The bookstore on the grounds was originally intended to be an actual bookstore, but it is really more of a gift shop, with at least half of the items devoted to cats. Pablo Picasso once gave Hemingway a porcelain cat. The shop sells $150 reproductions that are constantly selling out.
"We get all the crazy cat ladies who just have to have them," Gonzales said.
Visitors are always asking if they can bring toys for the cats. Gonzales says yes, as long as they are discreet about it.
There is even a wedding package called "The Cats Meow," which includes a one-hour site rental, an onsite wedding coordinator, and a complimentary champagne toast for $1,095. The cats are not particularly involved.
Here's the added value of the cats - they make what could be an incredibly boring tour for younger kids a little bit delightful.
One recent TripAdvisor review praised the cats as having saved the day for one dad.
"We went to this with four kids, ages 7, 10, 10 and 15. ... One ten-year old sat on a bench for a minute and a cat hopped in his lap and fell asleep. The other ten-year-old must have taken 100 pictures of cats. I think she counted the toes on every cat.....all in all we ended up spending two hours here with no one complaining about let's get to the beach."
There's a pretty strict no touching policy with the cats, unless they touch you first.
"You see people grabbing them and holding their paws so that their friend can take a picture. You can really sense the cat's frustration. They don't want to be restrained. So we have to have rules," Gonzales said.
Still, cats know when you like them and are happy to leap purring into your lap with little provocation.
"We came here for the cats. Definitely the cats," said college student Scott Franklin from Washington, D.C., as he scratched one tabby behind the ear. "I come here every year with my family, and this is one of my favorite parts of the trip."