Your comments

I need this too.  I only have a few properties but the reason I signed on for this software was to help me move properties from 2 small portfolios into an SPV - I need to prototype the property ownership changes and then change according to financing/tax changes.  

It's a showstopper if I can't move properties between portfolios. I can't risk cut & paste errors when deleting and recreating properties and shouldn't need to export/import .csv files to the same system.  Surely you can have a portfolio table with a field for  property codes - then you just move the property code in the portfolio table and have a couple of validations without touching any of the property data.