I'm not related but have wondered about Thomas Tucker living with the Jacobs in 1880. I'm wondering if there aren't two Benjamin Jacobs being mixed up here. Strange that no 1860 Census data is available but I have seen that before as the result of the Census taker's spelling and the transcribers errors. Probably there but misspelled. I don't see other Jacobs in that Census record.
I find Benjamin F. Jacobs b. 3-10-1848 d. 10-18-1917 listed in Dill's Cemetery Records. Buried at Odd Fellows Cemetery in Smyrna, DE. There are many Jacobs there. Benjamin is lot 312. Lydia L. b.1873 d. 1954 and Wife of John W. Jacobs is also buried at lot 312. Also, a 4 month 22 day old child of theirs, Irene is lot 312.
The Benjamin in the 1950 Census would be would have been born abt June 1850. Age 3 mos and Census date is Sept 11, 1850. Here is the transcription from ancestry.com.
Name: Benjamin Jacobs Age: 0 Estimated birth year: abt 1850 Birth Place: Delaware Gender: Male Home in 1850 (City,County,State): Little Creek Hundred, Kent, Delaware Family Number: 139 Household Members: Name Age David Mitchell 28 Hester A Mitchell 30 Thomas Mitchell 5 Charles Mitchell 2 Thomas Mitchell 60 William Jacobs 39 Mary Jacobs 21 Benjamin Jacobs 0
This looks like the Benjamin in the 1850 Census in 1880.
Name: Benjamin Jacobs Home in 1880: Smyrna, Kent, Delaware Age: 29 Estimated birth year: abt 1851 Birthplace: Delaware Relation to Head of Household: Self (Head) Spouse's name: Elizabeth Jacobs Father's birthplace: Delaware Mother's birthplace: Delaware Occupation: Works In Tile Yard Marital Status: Married Race: White Gender: Male
Household Members: Name Age Benjamin Jacobs 29 Elizabeth Jacobs 37 Benjamin Jacobs 12 George F. Jacobs 10 John W. Jacobs 8 Mary E. Jacobs 7 William L. Jacobs 3 Thomas Tucker 38