Spoiler: Shameless plug, but might be helpful for people
I understand most of the commentators, as well as OP, are probably looking to not spend too much time and money on their hosting infra. While that makes sense in the beginning, there might be a point in your successful journey where you want to hand over your operation duties to someone skilled and focus on building software because your business starts depending on safe and well-maintained infrastructure.
If you're looking for something between Heroku and AWS (both in terms of pricing and scalability) but based on K8s, with direct access to skilled platform engineers and personal support, you might want to check out https://www.ayedo.de/cloud/
I understand most of the commentators, as well as OP, are probably looking to not spend too much time and money on their hosting infra. While that makes sense in the beginning, there might be a point in your successful journey where you want to hand over your operation duties to someone skilled and focus on building software because your business starts depending on safe and well-maintained infrastructure.
If you're looking for something between Heroku and AWS (both in terms of pricing and scalability) but based on K8s, with direct access to skilled platform engineers and personal support, you might want to check out https://www.ayedo.de/cloud/