Different agencies have different philosophies.
I have seen some agencies operate, for lack of a better word, like meat factories. I have heard horror stories from girls who had to fuck 8-10 or sometimes more guys per day. Granted they only worked 3-4 days when they were were flown in by their pimp/madam, but still that's a lot That's still 2-3 dozen guys in matter of 3-4 days.
Then there are very small subset of agencies which will have, may be 1 or 2 clients a day per lady or sometimes not even that.
We don't know your situation and how much you are OK with working. The best person to answer the question would be the agency owner that you would be working for. But majority of the agencies are high volume, as they themselves want to make a ton of money in smallest amount of time. So don't be too surprised if you are asked to see at least 4-5 guys a day.
Its possible that the agency may pay for your hair, makeup, and clothes, but expect them to recoup the money by taking the larger cut out of whatever you make.
Does the agency you are planning to work for have reviews? If yes, you should find them using the SEARCH feature on TER and read them. This should give you some idea as to what to expect and help you get acclimated with some of the acronyms used in the business.
Also go to link on the top right and read the SELF HELP section. Hobbyist or Provider, everyone should read that period. There is some great help there.