My nine year old ducato van is brilliant about thirty or more i think with a 1.9 engine. I think you are more likely to pick up a good banger as a ducato than any other.
In your shoes i would use the 1500 as a deposite on something newer. But this depends on your circs, i guess like the rest of us you haven't got any choice but to make the window cleaning work.If you fail there are no jobs to go to so on that basis, the basis that you will succeed, get a better van that looks pro on peoples drives.
easy for me to say i know.