I would like to create a list of all mobile home parks in the US, including address, owner records, and number of pads. How can I find a list of all mobile home parks by State and sorted by number of pads?
Not the solution you seek, but this list should get you started.
There are a few national datasets, but considering the logistics of collecting it all, and how there are many more state/local datasets, you may find more success/more accurate datasets on those levels.
Mobile Home Parks - Homeland Infrastructure Foundation-Level Data (HIFLD)
HIFLD Mobile Home Parks GeoJSON
Oregon Manufactured Dwelling Park Directory and Query
Oregon Manufactured Home Park Directory
Search ESRI ArcGIS for tags:"Mobile Homes"
Search ESRI ArcGIS for tags:"single family detached"
Search ESRI ArcGIS for tags:"housing units"
Search ESRI ArcGIS for tags:"Mobile Home Park"
Zillow has tons of neighborhood data; you can also do a search for "Mobile" by state: Here's Florida's Results.
Mobile Homes in the City of Dallas
Mobile Home (Miami-Date County) Housing Units In Structure by Tract, 2012-2016 is an ACS dataset.
ACS - American Community Survey has a bunch of related datasets.