bailey produce ranger, gt60, olympus and pegasus. in each range there is approx 6-7 models. so thats approx 24 different caravans. if they produce one model for 3 weeks (production already determind) then you can do the maths and why it is possible for one particular model to take up to 7 months to be built especially if it is not seen by the manufacturer to be a popular model. but this waiting isnt always the case if the manufacturer gets a significant number of orders from their dealer network, they will alter the production schedule to meet the new demand.