Is udemy courses one time purchase or do I have to renew it every month and how long will the courses last?

Answer 1

tysm

Answer 2

One time purchase, and you own it for a lifetime.
You can read udemy faq for more details.

Answer 3

Lifetime access, Som ensure good value and are updated, some aren't and are obviously money grab. Shop wisely. I can recommend Ben Tristam's unity and unreal courses though