Therefore, in terms of the cost of web hosting, HTML - a cheaper option than WordPress. But do not differ cheap hosting terrible performance? If you pay for what you use - and you are using small resources, then say that low cost is justified.
Free hosting service as an option. Save your money can be through the use of free hosting. There are many different tips (available online), how to put a website in Amazon S3, Dropbox or any other cloud storage. Surprisingly, it works. Your site can be opened very slowly, but hey - you also only need to create an online portfolio with zero cost. In the case of WordPress, so you will not leave.
The initial investment, and, apparently, a long-term investment in the creation of a business portfolio or personal website based on WordPress template will cost a lot - along with the same HTML theme. However, in the long run WordPress can be a more effective option than HTML. For example, for eCommerce and business themes you can apply pre-ready WooCommerce themes that can be applied for any business purpose.