Hi calawawj,
There may be a few considerations. One is that Lippert, the frame manufacturer, is pretty conservative about adding things to the frame and if you should have a subsequent problem you may find yourself in a struggle to get warranty coverage. Combined vehicle length may be limited in some jurisdictions - I think some states have 65 foot laws. Not sure how a swivel wheel trailer would be regarded with respect to multi-trailer laws.
I'm sure you'll get some other feedback shortly.