Multi-post revision storage is said to slow down WordPress websites. False. WordPress is smart enough to ignore revisions while rendering the front end, and its MySQL queries are smart enough to not be slowed by revisions. However, post revisions occupy database space. Your posts are revisions, which means that if you have hundreds of posts, you also have hundreds of revisions.
Website development is not only about website creation, it also includes such processes as - choosing a domain name and hosting, designing and moving it from a demo domain to a real one, linking to Google tools for tracking and etc. So let's talk about each step in details.