Cats are cheaper than dogs- but like other have said, they are up to a two decade commitment. They are also not cheap. Their food, enrichment, and vet (especially end of life vet) costs are significant, but again, significantly LOWER than a dog would be.
I would happily call a cat a cheap pet- you are likely to only spend many thousands of dollars to keep them rather than tens of thousands.
Spend a lot of time with cats in general before committing. I grew up with them, so I knew what I was getting into. Adult cats are also much safer than kittens. Cats aren't as trainable as dogs (though with patience and the right mindset / understanding of the feline behaviors they are surprisingly trainable) so you are much more at the mercy of their inherent personality vs a puppy you can raise. That means meeting the cat as a fully formed adult will allow you to connect and understand the right one. Plus, SO many adult cats need homes.
I have cats, and a dog. I love my dog, he will continue to have a great life full of adventures, but honestly I will never get another dog when he is gone in what will most likely be seven to twelve years from now. Turns out, I am a cat person. And I found that out even AFTER living with a different dog a few year ago for a year, being the primary dog walker, etc. Be prepared to live with your decision for a long long time, and it is your responsibility to give the animal the best life possible, even through end of life care (Yes, euthanasia is an option for end of life, and is honestly probably more ethical than prolonging the life of a scared animal... but there are many issues that are likely to happen before that makes sense, when you can still give them a great quality of life- and it gets expensive)