You can never have too much truck. Yes the diesels are more expensive. Pay the money once. Diesels also hold their value much better. Just look at used prices diesel vice gas. I have a 14K 5th wheel, and will never go back to a gas truck. Gas truck will pull it, but engine and tranny are screaming for mercy going up in the mountains at 5K RPM + to hold 50 MPH. Most newer diesels also have an exhaust brake when you go down the other side of the mountain. At 7K you are on the edge for a 1/2 ton. More the tire and brakes than suspension and power. Most forget the total weight is the issue, not just the trailer empty. Fully loaded trailer, your family, full gas tank, and any stuff packed in the truck is your real weight.
