You can look online for sample proposals that you can work from, in many cases you will be able to download a template that you can work from. You will most likely find that there are dozens of sites offering hundreds of different templates to download. It may take a while, but you will find that there proposal forms that will match almost any need including yours. Take your time and select the one that best suits your needs.
Save Time _ Sure, you could make your own web sites and headers if you have the graphic design skills, the software, and the time. However, you may find your time better spent on developing and marketing your web site. What is your time worth? Even if you have the know_how and the right software, do you really want to spend your time on this time_consuming task? You would have a better chance of making money if you get your site online faster, and put more time and energy into marketing your site. Save Money _ Hiring a designer would save you time but can be expensive _ especially when you are creating multiple web sites. For about the same price you would pay to get one designer_made graphic, you could get a whole collection of quality, pre_made templates.