My simple goal is to have two instances. one is for database, second for just a site. Undoubtedly those 2 instances must have minimum network latency to communicate.
I know that there are so called placement groups but the problem is, they require expensive instance types to use.
Another option (to my mind) would be to use VPC. However, I can't use them. For some reasons in Management Console I can't create any VPC (look at the screenshot).
So my question is.
If I just create instances in the same region, would it work? I.e would they have a LAN like speed?