I charge by the project, not by the hour. This means I will give you a quote for the completion of the project as defined and you won’t have to pay for each little addition or change of mind (within reason). The project is over when you are happy with it. I ask for 50% to start work and the balance upon main delivery (i.e. when my part is done). On most projects post-delivery support, tweaks and advice are always included free of charge. As for cost, each project is unique so a meaningful range is impossible to give. But give me some details and I will give you an idea as soon as possible.