Those are logical reasons to choose the Elite I. My wife and I went thru the same logic and decided on the II. Tough choice. We have a puppy who is 65 pounds and growing. This will be our first time RV'ng, so everything is new to us. We are enjoying the process. We got a 250 diesel which I'm driving. It's comfortable and is averaging 19.2 mpg over the 8000 miles we've had it.
I got the diesel because I like the power, the diesel braking, and I had a good experience with a 2002 VW Jetta Diesel. I averaged 52 - 63 mpg with it and very low maintenance. The only maintenance was change the oil and filters and the timing belt. Tires now and then. I had 30% left on the brake pads and never changed the clutch out. After 275,000 miles I traded it in for the truck.
After I got the truck, we thought about getting some land clearing equipment. Then, I wished we had got the 350. I learned a lot about towing capacity then. Even though vehicles can tow something, you need to make sure you are legal in the event you are in an accident.