It's better to see her wherever she feels comfortable!!! Simple as that...
When I first started, following a lot of the business models most ladies had set up, an incall location seemed necessary. I had one, it wasn't much, a renovated apartment in the city that free parking and private access. But it became too much of an issue to keep up, more expense, and I had to keep more appointments for the costs and personally I am a one and done. Luckily I never got stood up and waited around for a NS, but I didn't charge more for the incall, at the time, and I had to say forget it, just didn't seem worth it to keep it.
Fast forward to today, and in my effort to preserve being "low volume", HA! I much rather prefer an outcall and yes, I keep that cost less. I can get to him, on time, I think I was down the street and got turned around my last appointment, so minus 10 mins, but I made it up with 30 mins OTC, OMG! I have a newer car with more MPG, so fuel costs are minimal compared to keeping a seperate incall or getting a room, etc. I can sneak away for a few hours and the only trail of footprints are mine going in his room/ home, not 4-6 guys a day trampling to me, lurking in a parking lot, or lobby. I like to respect the discreetness and low profile nature of the hobby. I'll still incall when I need to but outcall, just works for me better.