I think the €17000 will be regarded as a once off if you sent document information. It will be added to their savings which must not exceed I think €72,000 for a couple.
There are times when they will take into account the net income if there are additional expenses that can be shown, to warrant special consideration.
Like medication, pain killers etc. not allowed on the refund scheme and means paying out more than the monthly amount. Perhaps physiotherapy needed or incontinent pads, diabetic foods, other items which you might consider applicable. It is worth listing.
I think the medical card system is again being administered by the HSE and not a special, rubber stamp, agency as before, they would have more discretion.
Good luck Browtal