If a provider offers overnight encounter, just how many hours is that? What time does it start at? Do you decide time it starts and ends or does she?

specify on 8 hours.

I like to be able to have time to share some breakfast with the gal the next morning.

a particular amount of time in mind and a particular time that it starts or ends, just about all women who offer overnights will be willing to accomadate whatever your request is as long as you are willing to accomadate whatever her fee is for that amount of time.

by looking at the escort's web site.  Providers who offer overnights usually have all the answers to your questions spelled out in an area of their site. Most ladies will work with you on when you want to start and the hours you want to stay and the things you want to do, like dinner, dessert, breakfast, etc. It is usually recommended that you see the lady for a shorter session before you do an overnight, the reasons are pretty obvious.

Usually, you don't do an overnight with someone your just meeting. You are going to spend a good portion of the time sleeping together and you need to be comfortable with the lady and she with you. I would always do several hours together first and then during rest periods you can talk to the lady about what you want and she will provide in an overnight. I have started in late afternoon with a nice dinner and other activity included and ended after a late breakfast the following morning. I have also had it start as a late evening session and end shortly after waking in the morning. Overnights are truly a YMMV session but the best way is to broach the subject while having regular sessions with her,

This is an exception to the rule...  not about negociating the donation, but what is wanted & expected.  All costs will be the client's of course.  Include dinner?  Action before & / or after.  Mid-night romp?  Breakfast?  Wake up sex?  How much sleep do each require?  (Remember she may have responsibilities the day after...     Leave beverages sealed until opened in front of her.

Different ladies will offer different time frames.  You can usually find their listed times and rates on their websites.

You can generally ask her to start at a particular time (say 8:00) and it will end when the alloted time you bought is up (say 12 hours would end at 8:00 the next morning).

But as an option, why do you want to have a gal sleep on your dime?  I can understand if you're a single guy and have never had a gal sleep over, but otherwise why?  It would seem that you might want to consider that for the dollars you're paying her to sleep, you could arrange a gal to see you two, three or even four times for the same dollars.  All the while playing with a gal versus paying her to sleep.

Overnighters never have made any sense to me, but to each their own.  

Good luck to you.

start the day, especially if followed by a shower together and then a full breakfast to replenish the batteries.