When designing your website (whether you are doing it yourself or getting someone else to do it for you), it is important to consider who your site is for and what is it’s purpose.
I’m guessing the answer will be your site is to attract customers, but who are your customers, and what do they want.
For example are you selling to business to business, providing information that organisations, councils etc might want to read, or directly to the client. The style of the site could possibly reflect the content, for example if you’re providing something to help people relax, for example hypnotherapy etc then a calming style to your site. Sites do look good when kept simple and spacious, however you still need to ensure that all the relevant content is present. Google relies on content to help it decide your keywords and when to return your site in the results. Therefore the more information you put onto your site, will only help.
The balance you need to find is keeping the content user-friendly for the people reading your site and using the relevant keywords in the relevant places for search engines to find you too. Remember your site may look aesthetically pleasing but unless you have the information your users are looking for, or using keywords for search engines then it’s unlikely to be found by your potential buyers, site users.