I like the broom slightly better.
These ginseng Ficus are difficult to style as bonsai, as the fat roots project one sort of image and the slender trunks are completely incongruous with the fat roots. Most give up and prefer to keep these as attractive house plants rather than try to create a more typical "bonsai" image.
Google images of banyan style trees. Especially look at banyans that develop in open park like settings. In Mesa Arizona you should be able to develop this tree fairly rapidly. The key element of a banyan is the low, wide apex of the tree. They spread wide, but are not very tall. Lots of horizontal branches. And coming down from the horizontal branches are the aerial roots. These when they reach the ground, root and thicken, becoming secondary trunks. The tuberous roots could serve almost the same as rocks in the landscape, with the first 5 trunks sprouting from the rocks below.
You will need to plant this in a very wide, shallow tray to develop this image. But first, google banyan trees and see if it is an idea that appeals to you.
Side note. Ficus root easily from cuttings. Interestingly cuttings will frequently not form the tuberous roots that the parent tree has formed. You can make more conventional "bonsai" design trees from the cuttings from this tree.
