Towing question

Now a place that I looked for help is being rude. We have owned a popup since 2007 which is our first camper and we are still camping in it. It weighs 3500lbs so pulling it with the Explorer which we first had and the Surburban now hasn't been an issue. We are looking to upgrade to a travel trailer in the spring, but our truck is falling apart slowly and since it is 12 years old with almost 200,000 miles on it, my mechanic says it is not worth the money to fix it. Thus why we are looking for an new tv. We have three kids my 12 year old is already 5'9" and still growing and the kids travel better when they are not right next to each other. Thus wanting the third row seat in our TV. My husband and I love the quad cab pickup trucks, but don't see it as a good investment. Whatever truck we get is also the vehicle my husband will be driving around in as well. So, if I understand all that you said to tow a 7000 lb trailer I need a vehicle that is capable of towing a 1/2 ton without killing the engine. These types of vehicles are only surburban, tahoes or the larger pickups. So something in the more midszie range like a Durango with a V8 still is not a good tow vehicle for us? I am not an idiot or I wouldn't have asked the question in the first place, I would have gone out and bought the Explorer and burned out the transmission. If all you can do is write and be a critic of me than don't bother responding. I am asking for your advice and experience with respect I deserve the same.