Add cost savings tips for RDS and EC2

[minimice]

Add cost savings tips for RDS and EC2 by using the Instance Scheduler solution

[minimice]

Thanks @minimice for making the pull request, the link works and looks like it would provide another option for reducing costs.

Do any maintainers need anything else before merging the pull request?

Hello, no nothing else is needed, feel free to merge the PR

[minimice]

Can you merge @darigovresearch ?

[darigovresearch]

@minimice don't have write access so can't merge but would be happy to if you can provide write access!

[darigovresearch]

[minimice]

@QuinnyPig can you help to merge this I have no write access

[quinnypig]

Sorry for the delay; merged in!