I have priced up every rental option and by far the cheapest including all the parking charges etc is to pick up the car in Miami Beach and return it there 2 weeks later. (Flying London to Miami was MUCH cheaper than Orlando). I looked at getting a one way one day rental Miami to Orlando and then picking up another when we left Orlando but they all worked out way more expensive. I’ll keep an eye out though to see what happens to prices. They’re already double the price I had got for April 2020 when we were first meant to be coming out!