The one I am titling is one that you put together yourself, but since it is like a kit, they include a VIN number so I don't have to do anything different except pay for a title.
If you completely build it yourself then it wouldn't have a VIN and you would probably have to look into how to get a VIN number, and who knows what that would entale.
If you purchase a kit though and put it together they consider that a home built trailer so it may be the pretty close other than the VIN number issue.
This is all very confusing I have a headache now, my question is why is it IL even requires a plate for a stinkin trailer? Other states don't. Damn revenue generating government.