Trailers, even for the motorcycle?!

Hello everyone, I hope I’m in the right forum. If not sorry. I want to buy a car trailer which I would like to use to transport litter or sometimes building materials because I buy a house zz. Later I want to be able to transport with this car trailer also my motorcycle and that of my wife. Now the problem is that I only own driving licence class B so it must be a trailer up to MAX 750 kg. The second problem is of course the money. I had now thought of a hardware store trailer. Since there is usually the brand Stema: total weight 750kg payload 630kg outer dimensions (L x W x H) 292 x 150 x 87 box dimensions inside (L x W x H) 201 x 108 x 33 tyres (inch) 13 we come to my question would fit there 2 motorcycles? do you want other or better ideas? Money limit would be at 600€. thank you already in advance.