AWS & Digital Ocean Monthly Running Cost

[Advocatus]

I would like to move my websites to AWS or maybe Digital Ocean since my hosting provider isn’t very good. My preferred choice is AWS since they have a data center in Australia and the websites are run from New Zealand. The closes Digital Ocean Data center is Singapore which will be slightly longer respond / query time compared to Australia.

I’m really confused about the running cost and which plan I should select. Can someone please give me an idea how much it would cost to run two separate PrestaShop stores on the same AWS or Digital Ocean account using two separate domain names or will I need to have separate AWS or Digital Ocean accounts for each domain name?

Each store has about 100 products. Any help you could provide would be very much appreciated!