Found this little guy on Amazon this past weekend for $147 w/ free shipping. I'm getting ready to install a metal ceiling in my shop and thought this guy might make the job a bit easier.
Will hold up to a 4' X 16' x 1/2" piece of drywall, so should work well for sheet metal siding.
It lifts to 11' and they have a extension for $40 more that adds 4', didn't get that though.
The ends have outriggers that can be extended to support long pieces, they go to about 32" from each end.
Breaks down to just a few pieces to store.