I'm with RH. I know that freebirthing is still considered an extreme sport (and that's how I consider hospy births :P), yet if she's got ambulance cover, she could do this provided her sister was on board (nothing worse than a fear-monger during labour!), and go to the midwife appointments in the interim if she was felt it necessary.
Otherwise, I'd be dropping this Ob like a hot potato - he clearly considers himself to be a bigger asset to birthing women than he actually is.