The washing machines in my building are often on the fritz or steal money. I was going to make a simple web app where you can see which ones have been recently

The washing machines in my building are often on the fritz or steal money. I was going to make a simple web app where you can see which ones have been recently confirmed working or broken. It would rely on user input. I think I'll try to do this with AWS s3, lambda, and athena. I want to have operating costs below a couple dollars a month, since I will likely make no money on this. I've also considered trying to use Google Sheets as a backend.