I had a Plumeria when I still lived in California zone 8b. It spent summers in the yard but wintered over in my barn. It did very well that way for years until we had a particularly cold winter, then it died. On the other hand, the Oleanders, Mimosa and fig trees did fine outside (but were planted in the ground).
According to the zone lookup, you are in zone 6b. The Oleander and fig are probably hardy to zone 8 at least so will withstand temps in the 20's. The Mimosa Tree is hardy down close to 0. My neighbors have a huge one growing in their front yard here in zone 6b.
My point is that you can't compare a Plumeria, a tropical that can't handle temps much below 50 degrees, to your other 3 plants considered Mediterranean (still happy below freezing). It will only work if your garage stays above 50.
BTW, Oleander is an evergreen so keeps its leaves in the winter while Mimosa and fig trees are deciduous so drop their leaves in winter.