I would never have a WG in my home.
They can find out too much about you plus the GF would probably moan.
I can see her point.
If you don’t play to her rules she will just put you down as a timewaster. She won’t fork out for a taxi to a postcode/street with potentially hundreds of doors to knock on.
If you want her to come you are going to have to tell her where you live, but beware of scammers, blackmailers. They can find a lot about you from your address.