I use VoxelShop, there the models are super compact.
BUT, for animations, I had to actually use StoneVoxel, which exports like Qubicle, in big files. Else it was bugging the fisher outfit, which is by far the biggest file in my mod, the only that goes over 1mb.
So if you are going to animate outfits, I guess you had to stick with full files. Not sure though.
As someone who prides himself on small models: size of bounding box is key. Optimise and trim off all empty space you can.
Edit: bugger I just noticed I necro’d