"Wonder if something lower capacity...might be a more manageable size."
I believe 'twas mentioned in the vid that the lowest capacity units they make are either 14K(?) or 16K(?).
Likewise I believe, say, 6K-8K at
most would make more sense for the average hobbyist. 14K and up would be like killing a house fly with a nuke.
"...do they have arms like a 2 poster that can be attached (1 arm per lift mechanism)?"
"Arms" were not mentioned.