That IS a nice setup, and for a reasonable price, I think. I'd consider one of these, except that no matter where I go, I've gotta end up on an interstate somewhere for some portion of my commute, and if the bike can not comfortably hit 70 MPH, with a sidecar and a load I'll be run over.
Is the sidecar on your R65 also an Inder, or is it a Steib ?
This would be a great rig for Sunday morning rides in the country, though.
I noticed that ebay also has a nice looking 1967 Enfield 750 Interceptor for sale in Florida ($6K price tag on it now).