Is it a good idea to go in to sales/marketing?

Sales is a lot of fun, you will get to go to all the events, you will earn more money than the operational people, however the salary is always a moderate figure- if you are good with people, and you can believe in your product (that it will enhance a person/business in a positive way), then you will always make money. To answer your question - your salary will be $200 per week, and On Target Earnings will be $450 (if you hit your targets). Generally the OTE is achievable though, so be positive about it