Wheelchair Van For Hannah--Urgent

Our daughter Hannah needs to replace her 20 year old wheelchair van. In the last five years, she has had over 100 medical appointments and 10 trips to the ER, but we just found out that her insurance has denied coverage for this medical necessity. A local dealership has been holding a below market value used van for us, but they can't hold it much longer as they have other buyers waiting. The total cost of the van is $25, 493, but if we can raise $7,328 to put down on it then the monthly payment will be $300/month--the most we can afford. We have one week to meet this goal!