50 miles gives you roughly 2 x 30 minute out and return trips for the £100 burger
Yeah, well, it helps it you add the 15 minutes to each leg for taxy, power checks, take-off, circuit, approach, landing, taxy.
So a 50 mile burger run is more like 1hr30 ... and I don't know where you can rent an aeroplane for 1hr30 for £100.