I get all kinds of gifts, fruit baskets, bottles of wine, fine pens and all kinds of other gifts because I was the main speaker. These are all questions I am asked when someone is considering becoming a professional speaker. You do not have to use a computer during your presentations. If you are talking about computers though, it might make sense for you to use one. You certainly don't have to be a Cicero to make money talking.
Many people talk about some of the most simple concepts and make good money doing it.
You could talk about golf and how it is a metaphor for business. Click here to learn more about Public speaking.