The top escorts enjoy people, enjoy sex, and enjoy their work. The reasons for leaving the business include relationships, finding a job, not needing the income to supplement other activities and burn out. Developing a clientele takes time. Also you will need a phone. Pagers are out.
Cellular phones are in.
Also, word of mouth clients are always the best clients. The most successful escorts entered the business through networking with other escorts. If your sexual fantasy is to be an escort then try it and then make your decision. If your objective is for quick cash then don't quit your day job. If you are not organized enough to answer a phone or answer your e-mail then you might consider something 8 to 5, most companies have machines to handle customers and you won't have to worry about them.