Hi,
I could help you make your website look exactly the same as the theme demo in themeforest. However, the time it takes depend upon the number of products/categories you have, whether or not you have all the social platform accounts, whether testimonials are already available and whether there is a well-defined commision plans, etc.
I could work on your website for a day on a trial basis and you could offer me this job if you are satisfied with the outputs of my day's work.
Regards,
Elamaran