You talk about rates...yet out calls prices usually are increased, yet the cost of a room is no longer a factor and traveling is a constant, regardless.Many women hire a driver for outcalls, usually runs about as much (if not a bit more) than the room. That + gas = outcalls being more expensive. I charge $25 extra for outcalls, because I drive myself and have to always valet my car. Some women also may live in or near their incall, where travelling is negligible, but 10-20 miles from downtown Wherever-your-hotel-is.
I suggest having incall only on certain days. You rent a room say, Mon-Weds (or whatever your busiest incall days are) at a different hotel each time and then work as much as you want those 3 days. The perks of this are you can take visits anytime you want, as you don't have to check out at 11/in at 3. You have the lunch hour to provide which is great, as it's usually a busy time.
It may help save some money too, as since you're just booking a few days regularly you can use Hotwire or Priceline.