I teach pfls down to almost the flare.
I work on the principle that if the examiner says go around at 500ft great nothing lost. But if i called them off early every time sods laws says that the examiner would ask the student to go lower thus the student wouldn't be prepared.
Luckly most of the local farmers have been into the school at some point on trial flights and positively encouraged us to do them in there fields.
You wouldn't believe how boring it is doing a trial flight round some blokes carrot fields and tattie parks.
MJ