I’m using an Artec Leo but it costs a bit more than your budget. Scans are processed with Artec Studio. The features of the software used to process the scans are absolutely essential. One thing I wasn’t aware in the beginning is how much RAM is required to work with detailed scans. A project can easily be 30 GB and you need a few times more RAM to work efficiently.
I’m not sure what a scanner would be that plays well with Rhino since I think you’d do most if not all post processing in the scanner software.