How good are your Terraform scripts? Improving their creation and maintenance seems like a direct path to improving throughput quickly...and speed is the thing here because you don't have money to hire DevOps of which the important thing is "you don't have money" because the purpose of your job is getting the company to the point where you have money because not having money is how startups die.
Terraform vs IaC isn't what kills startups. It's the wrong problem to prioritize. Without money, there is no future to be more efficient in. Good luck.