Cost for a dynamic site is higher up front, but cheaper in the long run since you don't need to rehire to change the web site. And it is a practical and easy way for those who have large lists of products or property to present. Actually, the design costs for dynamic pages is cheaper per page, since the program lets you set up templates for products or lists, and show individual products, properties, cars, stories, etc. as a page itself. What looks like a 100 page web site may actually be 10 or 14 design pages. You pay less per page for design, more for the content manager, but it evens out in the long run.
Professional sites use dynamic programs with strong results.
Once you have the web site designed, someone has to host it so that others can see it. The actual host is a computer that is connected to the backbone. That's what you really doing when you open a web site. Prices for hosting can range from very cheap to very expensive. You are NOT required to use the same company as you do to access the internet-sometimes they are most expensive option, since they think they have a captive customer.