Questions Reg Ecommerce + Affiliate Marketing Website

Want to embark on this money making journey. Following are my questions:

1) I want to establish a WP site on "Mobile Phone" accessories
2) Is it a better idea to build one site with accessories for all kinds of mobile handset types or its better to focus on particular brand/models like: iPh / Android phones overall
3) I want to showcase hand picked models and designs and want those ones which are sold on Amazon / ShareASale / Etsy
4) Is there any particular WP theme which can automatically aggregate product description along with image from all these affiliate networks, duly format it as posts on this site
5) Please suggest some themes. I don't mind purchasing the suggested one
6) An example website which covers the scope as I have in mind above would help

Thank you!

Further to my above questions, which business model is better: An Affiliate Website OR establishing a drop shipping oriented storefront ( Shopify store ? )