You're talking about a 1994 Palomino popup here, hardly going to break the bank. If you're paying more than $1000 for it, you're paying too much. Go get it, hitch it to the Kia, bring it home, and prove it to yourself.
The trip home isn't going to kill you or the car unless something was already ready to come apart. That would be entirely on you for not properly maintaining the car.
If you don't like it you can turn around and sell the trailer for what you paid, or at worst lose a couple hundred dollars.
I am all but 100% certain you are going to hit the road and wonder what all these people with the doom and gloom predictions were talking about. Modern cars are designed with braking power to spare, because so many people drive like sausages these days. They need to panic stop more than ever, so manufacturing a car that handles and brakes well is of the utmost importance. Of course you can no longer drive like a sausage with a trailer in tow, but you knew that.