How effective is acne treatment compared to the cost?

I've been getting acne continuously since early summer, so I'm looking into acne treatments.

I don't think it will get better right away after just one or two treatments, so I think I need to receive them consistently. However, the cost is a burden, so I am looking for a cost-effective solution.

For those of you who have received acne treatment, how effective was it actually?

I'm debating whether it's better to choose a method that allows for consistent, multiple sessions for a similar cost, or to opt for an acne treatment with guaranteed results, even if it costs a little more.

I am looking for an acne treatment that I can receive consistently while keeping the cost down, rather than expensive treatments. I am curious to hear reviews from people who have actually tried it.

If there is an acne treatment that offered good value for money, please recommend it!