Another issue to consider is the lead times.
You are looking at about a year wait presently for all of the above.
I’m presently waiting a grant decision for a vivaro with a turny Evo seat (week 6 of what was supposedly a priority 7 day decision) if successful then once the vehicle is ordered the present van will be terminated and I’ll grab a used runaround that’s too small for the full family but better for my daughter until the vivaro is delivered or motability might be able to find a way to long term hire something.