I have a transit with 202k on the clock ans 8 years old , very little rust ,buy I have looked after it , spend a couple of hours steam cleaning and rustproofing the sills, box sections and under floor every few months. I service it and make sure it is not overloaded or hammered up the motorway. It just went through the MOT with only a couple of bulbs needed.
Transits actually come in lots of forms, different bodystyles, short, medium and long base, low medium and high roof , front or rear wheel drive ,and 4 engines , each with at least 5 different levels of tuning/power outputs,there are also several payload options too. It is worth putting in the time researching the right van in the range for your needs, it is not a simple range at all .