Do you still do evenings? I'm always surprised by the number of WGs who not only do mon-fri but who do 9-5 only too - do they really get enough clients to pass up on those of us after evening bookings?
I'm not against doing evenings and weekends if booked in advance, but it's more that having to stay in the house when other things need to get done (bank, post office, supermarket). Once I leave the house it's hard to get back in time, shower, get ready etc in time seeing as at least 70% of guys (particularly if you new in an area and you've not built up regs who are more likely to advance book) want to come to you as soon as possible and if your not free within an hour many will be disposed to trying their luck elsewhere. That's why when I work full time (and other escorts I've met often work this way to) I'll give myself set hours.
If your saving up for something in particular or you are just short term working, like some of the EE girls, I can understand wanting to just work around the clock, but if it's just your 'day job' for the foreseeable then you will want time off just the same as anyone else.
As for working 9-5, if you only see on average between 3 half hour customers per day across 5 days at £70, for example, you will earn £1050. If you pay for a second work flat that might not be so great, but if you work from home it's a very tidy living.
However pretty you are or not, you simply might not be that interested in earning more, and as I said before, escorts have friends/family too.
But I can only speak for me, and I'm only interested in money up to the point that it keeps me comfortable.