My firm is considering moving to cloud based services for our in house web application. We are evaluating AWS and we are in the early stages of doing some cost analysis on whether it's cost effective for us to move to AWS. I'm new to AWS and before I reinvent the wheel, are there tools (websites, Excel spreadsheet, ROI calculators, etc) available that can help determine the correct AWS solution and costs? For example, if I have three Linux app servers, 2 database servers, 10 load balancers, etc, how do I map the correct AWS solution to what we have today and determine costs from moving from our current architecture/infrastructure to AWS?
If there are no tools for this, are there message boards, communities or other resources that can help?