My 90 truckcab with cage and winches loaded up with waffles,spare tyre etc. used to weigh 2250kgs so would be well over on a 3.5t transporter.i seem to remember somebody having a iveco transporter uprated to 5ton but cant remember who it was?. Personally i have always towed my car on a hired 3.5 ton trailer(costs about £120 for a weekend but over £5000 to buy!!!) that way i dont have to worry about maintainance and storage,but you need a good towcar!!
Paul