CSS / HTML condensed for home page only

I need someone that's really good with CSS / HTML and that's like a 'perfectionist' when it comes to coding. I only need 1 page to be worked on. The home page. But I need them to be very careful. Basically the problem is : most of the CSS / Coding is in the [login to view URL] page itself. (which is the home page) I would like the CSS and other javascript / coding to be condensed into other files / folders....so that the home page is more cleaner and smaller file size. And so that only a much shorter amount of coding / HTML is on the home page. A new CSS folder will probably need to be created. But the person has to be very careful moving the coding over to these new locations (folders / files) as some of my affiliate id's are embedded in the links, and the links need to be copied and pasted perfectly...without any extra spaces. I would prefer everything is done manually, and not with automation software with this project. Plus, it's only 1 page so it shouldn't be too hard....the main key is I want them to take their time and be careful with the project...so that all coding remains intact.