ecommerce website html tweaked

I am about to get a readymade Webshop and I would like a couple of things slightly tweaked ie html front page look etc. I would also like it completely setup and ready ie add the text and images logo etc. There are about 75 items/products to add. The images and info are already available its a simple copy and paste.

Can you tell me how long it would take you to finish it and a price please
or If you can recommend something else then please let me know.

I would like to chat first