How're you deploying LLMs in production now-a-days? What's the best and most affordable way? [D]

I've been developing an AI product using LLM APIs (from OpenRouter) but want to deploy an open-source LLM in my own Prod env. which I can control.

Few reasons behind this are:

- I wanna own the complete stack around my product.

- Second I wanna fine-tune the model around my usecase.

So, what's the most affordable but a good platform for this? I'm not an AI engineer so don't wanna stuck in CUDA or Transformers hell, anything which can give me a straight path towards my private deployment.

Thanks,