Architect/designer/3D guru here, I second Ryan.  Vue is fun if you don't care about precision... unfortunately, architecture IS ALL ABOUT precision.  I've done 3 very large projects in VUE, and am deciding to quit using it until hmmm version 10 comes out or something.

scaling... tip I've figured out this past week... but am still working on... scale your object in VUE by typing in the exact x or y distance you know from your CAD 3D model file you are importing into VUE... so that 1 vue unit = 1 foot.  Then things go smoother.  I was unchecking the 'resize and rescale' box in my options, but found my CAD converted .3ds 3D models came into VUE WAY too big for vue to handle if they were on a large landscape... which my projects seem to be for some reason.

My suggestion is create a new file - a cube 1000' each side, divide it by 100' increments, import it into VUE and see how big VUE makes it when it rescales/resizes... then bring another copy in, and adjust it's scale to be 1000... go from there.  At least this way, if 1 Vue unit is 1 foot to me, I know where and how high my camera is...