The point is, most people don't realize how much expertise they really have, or the probable marketability of their training, knowledge and experience. The important thing is to look over your educational strengths, combine that with any special training or on-the-job experience, and then offer your expertise to help others with their problems along the lines you know best. You don't need a big, fancy executive type office in order to get started, especially if you start your consulting business on a part-time basis. A spare bedroom, a section of the basement, or even a corner of the dining room, will do very nicely. If you handle your own bookkeeping/filing, you will need a ledger of some kind, and a file cabinet or two. You will need a good typewriter if you plan to do your own correspondence.
An alternative is to do all letters, etc. in longhand and hire someone to put them in final form for you. Check the local high school or college. They may be happy to post your ad for a young lady looking for part-time work. You may even very profitably operate over the internet, delivering advice via video chat and online tutorials and using the free facilities offered by weRlive.com to promote your services. Once you've decided what area of business consulting you want to be in, and have your office or working space set up, the next thing is to let people know you're available for work. You have to make sure that you know how to make money expert. Definitely use some common sense and applied knowledge before spending any money on advertising. Generally speaking, you will pick up some customers, regardless of the problem area you specialize in, by advertising in your area's most popular newspaper.