Thanks for your input austin. I'm already using amazon and google cloud free tiers, also used heroku too at the beginning. The site gonna enter production soon and the free tiers will not be enough. I completely understand, that users should keep the site "alive" but at the beginning this is hard to reach and I also expect flood of users (for moments) that are gonna be impossible to keep up on this conditions. That's why I'm worried, and want to be prepared, problem is that I don't have many options. I'm not new to developing sites, but I have no idea how to start my "thing" with almost no resources(founding)