Sometimes, it’s refreshing to mix up your surroundings, rearrange the furniture and shuffle the art. But few people have the flexibility that Kathy and Steven Guttman do.

“We’re always moving something,” said Mr. Guttman. The Guttmans frequently rotate works from their collection of more than 1,000 objects of contemporary art and eclectic design among their four homes in the United States and France.

Of course, it helps to own an art storage company that handles the shipping, installation and inventory. Mr. Guttman, a real estate developer, created the company, Uovo, five years ago to cater to collectors’ needs.

“We wouldn’t even have Uovo if it wasn’t for our addiction to collecting,” he said.

Having Uovo “allows us to consider things that maybe we wouldn’t otherwise consider — like big, big works or more difficult pieces of sculpture,” Mrs. Guttman said. In their SoHo apartment, that includes an oversized diptych painting by Amy Sillman, a large off-kilter ceramic sculpture by Arlene Shechet and a floor-to-ceiling framed knitted piece by Rosemarie Trockel. “It couldn’t come in and had to be taken apart and stretched here on site,” Mr. Guttman said.