Perhaps its good to have a look at the MG range of cars as they are of a similar size boot wise to the ZRV so the hoist should work and their AP is really good value on the scheme at the moment.
I have to agree that my dealings with grants has been very helpful and they definitely pay attention to your needs but as already mentioned they will just make an offer of help based on needs and not wants. I am sure that you will find something to suit 🙂