I don't agree, assuming a lady charges 200 for an hour incall and 180 for additional hours thats 380 for 2 hours. To go to outcall a lady has to prepare herself at your request so she's not going to do that for nothing, then she has to get a taxi to where she is going say another 30 mins, then 1hour + with you and 30 mins back, thats 2 - 3 hours of her time for 80 -240 less than her incall rates so your actually getting better value.
I don't know your background but a hell of a lot of professions charge traveling time, especially to an emergency call out, I know my alarm guy does and he lives in Kildare and my air guy lives in Wicklow