It doesn't have to be expensive- I think a lot about acquiring the ability to reproduce foreign sounds is about losing inhibitions and being prepared to experiment and trying to make sound in ways that are unfamiliar to us. Also, it doesn't have to be perfect. When I was living in Cambodia, they can use a sound like the
ng we have in English after vowels (
sang) at the beginning of words. I tried and tried to get it right, but I could not reproduce it well. At least by trying, you may get somewhere near to unfamiliar sounds, which is an improvement.
You can strive for perfection, but it's a good idea to be prepared to settle for fluency, or even comprehension. One of the great writers of English literature,
Joseph Conrad, was Polish and English was his third language- to become a major writer in your third language, and one he didn't learn until were well into his adult years, is extraordinary. Few can do it in their first language, but we needn't feel we have failed if we can't emulate him. And he spoke English with a foreign accent. ;-)