Thanks for replies, it all makes perfect sense. Never thought of the tire thing (moving tag tires to front if needed)
Narrowing our search down to a few different models.
All are approx same length 40-42.
The single 40' units are on a 276" wheel base, the 42's are 276"+ tag
One of the 40' units is 254"+ tag.
RV Consumer group rates units and wheel base is one of the things they rate on. Since the 40' unit with the tag has a shorter wheelbase they rate it as being less stable.
I thought it odd as my thoughts were that the tag added some stability, but as I mentioned I have no experience driving coaches.
For all the license police out there, I will be upgrading my current license to one that permits me to drive units with air brakes and weights over 24,000 lbs (which I believe are the restrictions on my current license here in Ontario), before we purchase any coach.
Just gathering info at this point
Thanks for replies, any other info is appreciated
Doug