8m-Wgen with driving licence BE allowed?

A friend in the yard has an old caravan Bj. ’80 standing (snow find) type and weight is unfortunately not known. No vehicle letter. The mobile home is about 8m long and approx. 2.8 – 2.9m wide. Inside completely empty, so that the weight will not be too high. Since he has no use for it, he would leave it to me extremely cheap. Now the question… Can I drive the bullet at all with my driving licence BE? I would have to transfer it about 600km. Red plates have i Ch. As a tractor I could borrow a VW T5 (delivery version with 3 seats in front, empty at the back). Is this permissible? How much do I like the delivery version of the T5… about 1.8 to 2t? What do you think about how much kg the caravan comes from? is completely made of wood… I have never worked with the guidelines of driving licence BE before, since I have only ever driven with trailers. With driving licence BE I can also pull trailers with more than 750kg, but is it also so Should the trailer be lighter than the towing vehicle? Would you be nice if you could help me!