I don't think there's anything wrong with this. The correct answer is not always "outsource to AWS"; dependence on AWS (and any external dependency, especially

I don't think there's anything wrong with this. The correct answer is not always "outsource to AWS"; dependence on AWS (and any external dependency, especially those you have to pay for) is also tech debt. Everything you do is tech debt, and since this is just you, building it yourself is not only respectable (here, have an upvote!) but could also perhaps be something you end up doing 2-3 years down the line, and you've just gotten ahead of yourself.