Sure. But you just need to run your server at full bandwidth for one hour every day to use up 10 times more bandwidth than even lightsail would give you for the price of the server.

I assure you that you can run these servers for one hour a day and no one will bat an eye. I know people running seedboxes at full speed for 10 hours a day or so without an issue - that's 100 times the bandwidth of even Lightsail for the same price.