Hi There,
You might like to concider what I did, I bought two sankey chassis where the axles are rated at two ton each then cut and shut with reinforcing to strengthen the Joints, add some steel cross members and deck out with scaffold planks. couple the break linkage up, lower the towing eye position to suit your vehicle if neccasary and add lights and with very little work you have a strong robust relitivly light twin axled trailer.
Louis