We've seen all the ads - 'Build your site instantly with no previous experience' - 'Free web-builder tools'.
They are usually linked to a low price only '£X per month*' - (note the small asterisk). Here is the clue, most of the companies making those offers are hosting providers. The cut price offer is usually just for the first year, after which it reverts to a more commercial price.
What the providers are looking to do is to tie you in to them as their long-term host.