I’m looking to utilize both Amazon Affiliate Marketing and Adsense. I like to write so my plan is to make a site about movies, games, andmusic videos. I also want to do a comprehensive site with my money making tips as well.

Firstly, I’m not sure if I should put this all on one site or each separate?

Secondly, are these all good avenues to use for Amazon Affiliate Marketing and Adsense?

Last but not least, is it best to buy a domain or use free site hosting for this?