Hello,
If you are currently enrolled at a higher learning institute and have a school-provided email address, you can request a code for free subscription time through GitHub’s Student Developer Pack. Just create an Unreal Engine account at www.unrealengine.com, create a GiHub account and then go to GitHub’s pack page here: https://education.github.com/pack. There you can follow the links and request the pack. It may take a couple of days for them to verify your email address. Then you will receive a code for your subscription. Please let me know if you have any questions.
Cheers!