Forstly most of us only ever have the town we work in displayed for safety reasons.  What you are saying there is somethig like google maps which alot of us use anyway

As for another escort advertising platform, you would have to offer something really good to get people to use it.  Also you would be competing with some of the very best sites that are the top of google that also happen to be free.  Yes having a site where we can update our own profiles is a good idea, one 1000's of other advertising sites already do.

What can you offer as a paid site that the free sites do not?

As for reviews, why???  How are you going to ensure the reviews are not fake or malicious?  After all anyone can leave a review and without monitoring it then it would not be worth having.

As I have said not one of your ideas is new so what can you offer to make it worth using it let alone paying for the privilege

Sorry to sound negative but there are so many sites just like this so you actually need to offer something rather worthwhile and a bit different if you want people to pay you.

Type in escortin any area in google and you will see 1000's of sites far too many for me to list.  Most of the main ones are on the first page though, as these are the ones that get the most traffic they tend to be the most popular.  After all a client is not going to go through google for hours to find an escort when there are thousands on the first page on the sites there.
A client does not want a map all he needs is the site to have different areas listed so he can click on them and see all the escorts in that area.  After all he does not want someone in his neighbourhood does he for discretional reasons.
Most of these sites have a page where we can edit it ourselves. 
As for self editing reviews, what would be the point. As soon as a client sees we edit them ourselves they then become non valid, as none of us would leave a negative up there would we???
We could also sit at home and write them ourselves so what would be the point.  A reiew site is only any good if the escort is not moderating them herself and someone else with no ties to that escort is.
Basically what you are offering is the same as everyone else but with a map and pins instead which is actually more of a pain for the client as he has to go to every pin in the area to see the women rather than just click an area say Nottingham/London/portsmouth etc and a full list appears with pictures like every other site that works well.
You will be making it harder for the client to find women and that is never a good idea.  As I said they dont want maps with pins they have to hover over they want to click once and see pictures of everyone in that area.

Obviously you have suddenly thought to jump on the old 'lets make money from escorts' band wagon when you clearly have no understanding of what either escort or client actually want or need.
If you want a successful site stick to what you know and understand as I can tell you now you wont make much money from an escort site unless you suddenly overnight become more popular than the tried and tested ones that both escorts and clients know well.  You will just be competing with the 1000's of others who thought it would be an easy way to make money and then found out it isnt and they end up disappearing or stealing escorts photos and details to try and make their site look busy to attract other escorts and that does not work either.