Although web sites can be very flexible, the coding required to put it all together can be very complex. It's usually much easier to create a new web site from scratch, rather than trying to modify someone else's existing code.
It can be done but may not be the most efficient or cost effective.
Your website's "look and feel" can be something we work on from scratch, or something based on ideas you have seen in other websites that you like. Or a design that has already been made for you.
Professional web sites require care and planning to do things right. In most cases, I suggest allowing 6-8 weeks for a site's completion. The timeline is very much dependant on just how complex the website is, and well-prepared and available is the client content- if they have their text written, photos taken, and various other details worked out.
For some clients, a web site completed within a days. For others, the process turns out to be in weeks rather than days.
Possibly. Much depends on the scope of your needs. If you simply need someone to add or modify text in your existing site this may not fit with my workload. If you're looking for a significant redesign of your site this is more in line with what I offer.