Mammalian04-
First, determine the tow ratings of the coach.
Here is a link to a Google search of iRV2 posts with the terms "LTV." "Unity" and "GCWR" in them, to help with your research.
Second, you should weigh the coach and any potential toads. Published curb weights are usually lower than actual.
Armed with that information, you can calculate what is safe to tow to stay within the coach tow ratings.
Testing with a 4,000-pound trailer in the dooryard is not the same as having 4,000 pounds behind the coach on a three-mile, seven-percent downhill grade.
The LTV is a pretty small coach. The lightest practical toad you can get- such as a Fiat 500- would be a better choice over one that bumps up against the tow ratings of the coach.
However, if you look at enough iRV2 posts, you'll realize that some folks tow what they want, even if doing so exceeds the ratings of the coach.