Thanks for all the great suggestions. I definitely will check into the height of the garage door opening. Didn't someone on this board have to let air out of the trailer tires to get into the garage? ??? That would be something to avoid if possible, since we are still in the planning stage of our move. Our TM has the roof mounted AC which makes the clearance needed even greater.
I think the garage door opening may be nice and high since the new house has 9 ft. 4" ceilings and 8 ft. tall front doors. That "tallness" may also apply to the garage door and garage ceiling height, but I will make sure first. By adding onto the garage about 2 ft. and getting the swing tongue, we will have some flexibility if we ever get a longer TM.
Walking around the camper will be better too. I hadn't thought about amortizing the cost of the garage addition over the length of the loan, (which is also tax deductible) - another good point!