I think for the Price some bespoke Trailer are offered you can buy something like this: Anssems Autotransportanhänger AMT 2000.400x188 Eco (weight 365kg without ramps, with dual axle, brake etc.)
When completet for a threewheeler it still would be usable with a 4wheeler.
You have to add a middle ramp etc., Problem is maybe the ground clearance!
Nice -
https://anssems.com/shop/amt-1500-400x188-eco/ might work OK too - German quality. 2600 Euros with the infill per
www.aluliner.com