Welcome from Central florida by way of Seattle Wa. lol..
Where were all of these duallies when I was in the market for mine or when I shipped mine to Fl? Today, the dually is litterally chillin in the north Seattle area.
As stated previously, the truck looks like it may be a good starting point.
Laying frame on 22s says just that. Body dropped lowers the body to the point the body is touching the ground (parallel to the frame).
Here's an example of one that I took at a show this past summer.
Good luck with your choice. Enjoy the build with your daughter.