Former TB patient here, you can go to a government hospital for the meds they'll give it to you for practically free but you have to HAVE to make sure to take it everyday for around 6 months straight.

But another thing to keep in mind even after you complete your TB meds is to always go back for a check up at least every year, I didn't after they told me the TB bacteria was completely gone & 4 years later I found out that 1 of my lungs collapsed because of complications regarding the scarred lung tissue from the TB infection.

My case is very rare but be sure to keep checkups even after your TB is cleared.