If you can't find the VIN (I've seen a few posts in this forum that it MIGHT be stamped somewhere on the tongue), you might be able to do a few mods to it and register it as a "homebuilt". Treeclimber, one of the other mods here said that's possible in Florida (where he lives). I think he's faced with a similar situation on a trailer he's rebuilding.
There HAS to be a way to register trailers like this! Yours is not the first thread that complains about not finding the VIN and having no paperwork. This tells me it's not a problem unique to HiLos either, it has to be happening to all trailers, and not just travel trailers either. Possibly, it also happens when someone finds a very old auto in a barn and restores it.
Perhaps your State's Motor Vehicle Department would be able to offer some advice, but it might be hard to come by during the Covid-19 shutdown.
- Jack