The most important and costly part of a project is its security. And security measures increase as per the size of your project. If you are thinking something big, you will surely need more security for that, but if you are just trying to start a very small service like a faucet or something like that, it will surely cost you less in compared to bigger projects like gambling platforms, exchanges or any other major project like that.

I personally would not recommend a person to start any project as long as he himself does not know anything about securing himself, as that can be dangerous for the project these days as we usually see hacks happening to even bigger projects, so if someone finds out about the project and finds it easy to crack then there are chances they might do an attack for even less money if they are easy to get.