Mitch,
I think you need to reach out to people with your floor plan ONLY.
My 44B has no issues with temps. Keep in mind if you are heating with Aqua hot then zone 2 is Floor heat ONLY which is why the sensor is low to the floor.
If you think this is going to work like your S&B I think you might want to reconsider.
My coach stays very comfortable in sub 40 degree weather with zone 2 at 78, zone 1 at 68 and zone 3 at 65. when we go to bed we like it a little cooler so setting zone 3 down to 63 works very well.
I keep the AH burner on ALL the time when below 40.
Have you watched the Tuesdays with PJ videos on youtube? If not Highly recommend so you can understand Entegra's engineering.
This is key to understanding a lot about your coach.