It is important that your website works on all devices, recent studies show that every year more and more users visit websites on their mobile device rather than their tablet or home desktop, in 2018 — 48% of web traffic came from mobile devices, and that amount is rapidly growing. (Source: Statista)
The simple answer that every website is different and is charged differently, but usually my clients pay me around $150 to $600 for their project.
I try to finish every project as quickly as possible, usually it takes around 1-2 weeks for the project to be finalized.
The website will be transfered to your hosting enviroment and will be yours. I can also host the website and offer support for a low monthly fee.