I would rethink your toy hauler to pickup budget. Right now you are about $50k for a toy hauler and $15k for a truck. So you will be towing one if the nicest toy haulers you can with a 15 year old pickup. Getting a good pickup that ta reliable and will pull 17k comfortably is hard to find for $15k.
You can maybe get into a Ford 6.0 diesel, but I'd do your research first. They are finicky and you have to do some specific work to it to ensure it rubs right. And sometimes even then they run into issues. They will pull awesome to after you get a tuner and some other things.
Other than that, as others have said, early 2000s diesel.
