You can write a good business wining proposal for the service industry. All you need is to make a whole plan so that you can easily work out on the plan how you can start the business for yourself. So for writing the wining proposal you need to write the articles in order to get to know to the reader how will he get benefit from your business? and assuring him that you will not waste his money and time for working with you and clearly tell the brief plan of your business.