How many urls per project?

Hello guys! I have a question! For example if you website have 10 pages! Do you add them all on the same project or you create a project for the home page and then you link each page to the home page project? I dont know if it right cause your home page would be your money site right? Is it ok to create backlinks to your money site with SER?
Im a newly  :) I just bough a template from Soundseo but I think my projects are way better lol