Your potential customers may associate an amateurish logo with untrustworthiness. Avoid this problem and have your logo professionally designed. Browse the logo gallery, if you like what you see, make a request http://www.nachi.org/inspector-logos.htm
If you need a logo quickly and place an order you can move into the express lane: http://www.inspectoroutlet.com/express-lane-brochure-and-business-card-package.aspx
Once you have a new logo it should be on your site, which can be handled by inspectorpages.com and it should be on all of your marketing materials (business card, brochure, letterhead) contact jessica@internachi.org