woo v shopify Whats best?

Hi

I want to setup 3 stores for dropshipping. I want to know what is best using Shopify or making my own store. I have merchants so taking payments is no problem. I am also confident I can knock up a half decent store using a template. I wanted to know if Shopify has any advantages for marketing the store against my own website or any other advantages I should consdier. One consideration I have is, my budget. It is on the low side of nothing.

Any advice is welcome.

Thank you