AWS Billing: 5 things you should do right now
cloudacademy.com
cloudacademy.com
Earlier this year, I was trying to plan a migration from Rackspace to AWS - brought a database server online at AWS on par with the size of ours at Rackspace and did some testing (to try to simulate a real world scenario). Got distracted by some other projects for a few weeks and all of a sudden comes a bill from AWS for almost a grand - we "didn't even use it"
Fortunately, as a 1 time courtesy, they credited it back, but the boss was definitely not happy, haha.
Be very careful what you turn on and what size it is.
Rackspace, is a bit more clear on pricing IMO.
Luckily, you can experiment a lot within the Free Tier, especially for tests and simulations.
Anyways, which size and what kind of database were you migrating? Have you tried Aurora yet?
The boss is happy with Rackspace and regardless of price, options, features, etc... he doesn't want to leave. I can only do, what the boss allows me to do. I don't hate Rackspace, I use them for other projects, but their service has gone down in recent years IMO.