Finding a good Top Lever Domain for your business is challenging. About the only way you can get a good Dot Com is to use numbers in the domain name (Like host405.com). The other Top Level Domains like .io .biz .co .me etc work just as well if most of your advertising is going to be online and people will get to your site by clicking. 20 years ago all the traffic to a site was driven by radio and TV. If you plan on using these mediums to advertise you will most likely need to spend some money and purchase an easy to remember domain.