Here's a page that let's you see many sample business plans. You can even get cheap software that lets you edit an existing business plan, customizing it to your needs. I'm sure there's a market for the service you are thinking about. Do your homework. Get it right.
http://www.bplans.com/sp/businessplans.cfm
A solid business plan will address all of the following issues;
1 Executive Summary Highlights
2 Objectives
3 Mission
4 Keys to Success
5 Company Summary
6 Products
7 Market Analysis Summary
8 Strategy and Implementation Summary
9 Management Summary
10 Financial Plan