Question about R-pod Vs. other small trailers! New to this!

The determining factor may be the van's payload. I would suggest you take a photo of your van's sticker (with gvwr, etc.), and identify the year, make & model, and its payload, then post that info here for more detailed help.

This is the best forum for towing calculations I've seen. These guys take their numbers seriously. :). With the above info, they can help you determine what you will be able to tow.