Call some of the local universities and ask if they have an SBA department. If they do, you can go there and get assistance at no charge. They'll help you tweak the plan and make sure that it conforms with generally accepted business practices.
Another avenue would be to find the local chapter of SCORE (a group of retired executives that assist small business people in running and/or starting up a business - there is no charge for their services, except for any direct expenses that might be incurred by the person that assists you). SCORE can be a big help in getting started with such things as budget preparation, business plans, how to deal with banks, etc. These are people that have a solid business background and are volunteering their expertise and experience to assist others. And, in your neck of the woods, there are probably some very good SCORE chapters given the number retirees in your state.