Monday's Mystery - Ruth's employment and where?

No this is not the Downtown Abbey staff (I loved that show by the way).
My first cousin once removed, Lynn Eckberg, shared these photos with me. They were in an album that belonged to her Mom, my great aunt Ruth (Abrahamsson) Soderstrom. She did not know the story these photos show but we can say for certainty that the fourth from the right (white apron) is Ruth. I have been researching on and off for over a year without luck but I WILL someday figure it out.

Does anyone know the story or do you have any ideas?

Ruth: fourth from right, no hat

The group stands in front (or back) of this building

Here are my thoughts, ideas and avenues I have investigated...?.?.

* when Ruth left Sweden she stated her father bought her ticket and her last residence was Stommen therefore she most likely did not work outside her home in Sweden. This building is in the U.S.

* The building could be a hotel, estate, hospital but I'm betting on estate as the staff looks like a personal staff. There appears to be two butlers, two maids, two drivers, nanny and Ruth appears to   be most likely cook or kitchen staff.

*This appears to be the backside of the building (God forbid the staff be photographed at the entrance). The front may be even grander.

*Ruth settled in Moline but may have worked in Chicago area briefly. I have searched online for estates this size throughout Illinois, specifically quad cities area, but no building I have found as yet matches this one.

*Some sort of fancy spa or fancy rest home for the wealthy?

*Her husband was in the cavalry WWI. Some sort of soldier sanitarium?

Inspect this and give me your thoughts or ideas. One thing I have learned with this hobby of genealogy is that you never know when the smallest tidbit, rumor or detail takes you home.

Thanks,

UPDATE October 9, 2020 -

With information from Ruth's youngest daughter Evelyn and a little internet sleuthing we now know that Ruth worked as a chef on the Velie Plantation. Willard Lamb Velie was the grandson of John Deere and was quite a prominent fellow in the Moline area.  The Velie's along with the John Deere & Co. became the top industries in the Quad cities at the turn of the 20th century. Williard became quite rich from his buggies, carriages, cars and trucks. It didn't hurt that he married Annie Floweree, the daughter of a millionaire cattle rancher. 

Their grand home, on 500 acres had 46 rooms designed like the Italian villas they saw during their travels. Besides the beautiful three story home with 14 bedrooms and 12 baths, it was also a farm.  There was a vineyard with over 20 varieties of grape, land for livestock and more. Later the home became known as the Velie Plantation because of the greenhouse that produced bananas and tropical fresh fruits for consumption. For years the Velies lived in this home with their two children and threw huge parties. They were the socialites of the time. In the 1920's their fortunes changed and they left the mansion which sat vacant until it was remodeled into a restaurant. The Velie Plantation, open from 1945 to 1983, was the social setting for those in the Quad cities. Today it is a bank.

Vilie Plantation History lives on in Moline, Illinois

*click on photos to enlarge for easier viewing*