2008 Ford F-150 quadcab 5.4L Triton V8 4x4 w/ Towing Package + Brake Booster
You can easily put as much as 3000 lbs in the bed or tow 9500 lbs, or both.
Pets allowed. City gas mileage sucks, about 12 MPG tops. But I drove from VA to MA with 4k lbs of Cargo and got about 20. It likes to tow, keep the weight low (center of gravity), load your trailer right and you won't even know it's there.
I'm expecting people who may be interested to be the sort who need a truck on occasion and just don't happen to own one. As such I fully expect you to USE the truck. Where I draw the line between "use" and "abuse" can be considered foggy. As far as weights go, if you load it and the tires aren't rubbing anything and it can still move, then I'm OK. Don't stomp on the accelerator, don't use the 4x4 for no reason, ect and we're cool. That being said this is one of my families daily drivers, but I have an odd work schedule. Generally speaking this will be available on the weekends, and only on a day or weekend basis. Any duration of time longer than that isn't going to happen, at least not until I get my motorcycle. Keep in mind the closed mouth doesn't get fed, there's no harm in asking.