We can see Thomas at the Wisconsin State Census, 1905 at Crawford County - Seneca Township:
McCartney Thomas J Head M 45 Married born Penn, parents born Pennsylvania Occupation Farmer who owns his farm via mortgage.
Alice McCartney Wife F 38 Married, born WI, parents born England
Oliver M McCartney Son M 18 Single born WI, parents born in PA and WI, farm laborer
Edith N McCartney Daur F 15, Single, born WI, parents born PA and WI
Nellie V McCartney Daur F 13, born WI, parents born PA and WI
George E. McCartney Son M 12, born WI, parents born WI and PA
Alice M. McCartney Daur F10, born WI, parents born PA and WI
Arthur T McCartney Son M 9, born Wi, parents born PA and WI
Amy A. McCartney Daur F 7, born WI, parents born PA and WI
Fred McCartney Son M 5, born WI, parents born PA and WI
Leslie R. McCartney Son M 3, born WI, parents born PA and WI
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Buried next to his parents James and Mary Jane McCartney in Dixon Cemetery in Lynxville, Crawford Co., WI. Died of stomach cancer. He was sick for a long time and couldn't eat. Ada told me that one day her grandpa Watson was visiting Tom and Tom said "Boy, I could really go for a piece of your wife's custard pie." G-pa Watson hurried home and had her bake a pie and took it back to him. Tom was so excited and quickly took a bite -- but he could not eat it.

Alice, taken in the 1940's with her daughter Edith McCartney, grandaughter Margaret Hacket, and great grandson (click to enlarge)

Alice is buried at the Dixon Cemetery, Seneca Township, Crawford County, Wisconsin, USA, next to her children Arthur and Amy and granddaughter, Dorothy Lorraine.

Alice Amelia very nearly died from the same meningitis outbreak in 1872 that killed her brothers Ira, Thomas and Fred. It is said that a Native American Medicine Man cut open her spine and packed it with herbs - amazingly, she lived. She always had a bad back and was in a wheelchair as an old lady.
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Alice's husband Tom died in June 1906, and Alice remarried to a man named Lou Fry in 1915.

Arthur didn't marry.

He is buried in Dickson Cemetery, Seneca, Crawford Co. WI. Hi sbody was shipped home from Montana by train after his heart attack, and was laid to wait in his sister Edith's home for a day before the funeral took place.

Amy was married on 25 Dec 1918 in Montana to Glenn Davis. Sadly she died the next year due to a ectopic pregnancy.

Alice didn't ever marry.

She nursed her brother through the flu and he survived, but she caught it and died. She was a school teacher and was homesteading land grants in Montana with her brothers Ollie, George and Art and her sister Amy.

Alice died during the great influenza epidemic of 1918.

George married Lydia Kopp, probably in Montana, USA but we believe there were no children.

Nellie married James Watson on 9 Jun 1914 at Prairie du Chien, Crawford County, Wisconsin. James was born 6 Aug 1881. They had two children Ada Alice and Amy Ethylin.

Nellie is buried in Dickson Cemetery, Seneca Township, Crawford County, Wisconsin.

Oliver married Margaret Enger in October 1915. Margarte was born 8 Sep 1885 at Churches Ferry, North Dakota, USA. They had two children Earl Oliver and Olive Mae.

Oliver was shot and thrown down a well but no-one was ever prosecuted. Story has it that he had his wife and his girlfriend pregnant, and the girlfriend's brother shot him.

Fred married twice. He married his first wife Harriett O Thornburg in Jun 1925. Harriett was born 14 Nov 1902 in Creston, washington, USA. He later married Jennie Childs in October 1978.
Fred had 2 children, Dorothy Lorraine who died aged just 2 days, and Patricia Faye.

Leslie married in Montana to Nel Ungelshbe who had beenpreviously married and had three children.

This child probably died at birth and is simply recorded at C. T. McCartney on the burial marker. We suspect CT is simply, Child of Thomas McCartney. The child was buried at the Dickson Cemetery, Seneca Township, Crawford Co.