I strongly suggest you review SAS's support policy for Viya 3.5 before commiting to migrating to AWS. Right now, full support for Viya 3.5 finishes on 1 Jan 2025. That means you are spending a lot of effort migrating a product that only has another 18 months of full support. Have you considered switching to VI on Viya 4 on-cloud? I recommend to discuss your options with your SAS account manager to get expert migration advice.