Have you mentioned that price to Greenlight? As they may decide to price match.
the wife being epileptic
I was under the impression that being epileptic would mean she would have to surrender her Licence? - I know this is certainly true for HGV drivers.
I'd imagine having some kind of fit whilst driving ,regardless of what type of vehicle, is not good....
Pardon me for asking btw - I'm guessing she's controlling it with prescribed drugs?
You have to be fit free for a year, or generally on meds to control it. She lost her licence twice, each time for a year after having fits but now she's controlled she's fine to drive. Just have to keep the DVLA informed.