Also should be included is license costs. It's easy to forget that special feature you are using in SQL Server or Oracle can increase you to a much higher licen

Also should be included is license costs. It's easy to forget that special feature you are using in SQL Server or Oracle can increase you to a much higher license. Main areas for concern for license costs are DB and windows server. Also DevOps people are not cheap. You need to factor in implementation and maintenance. I could be using that money on a bigger server with less complex infra.