Hiring a car in Florida

We have now booked a hire car, which we will pick up at Orlando Airport.
We have chosen a minivan, as that should be able to take Sally's electric wheelchair.
We have booked through Airnet.co.uk as they appear to be the cheapest.
It appears to be cheaper to book a hire car in the UK than locally in Orlando!
The cost for 2 weeks is £325.00
we have booked it for 2 weeks as we hope to buy our own car reasonable quickly, however, it is possible to book it for a further week if necessary.