The easist way to create and delete Transfer Family is via IAC (Infra as Code).

As others suggested cloudformation is a way of IAC, I personally prefer terraform it somehow is easier to learn and does nor cover only aws. Comes with good example and community.

Let me share couple of examples to some similar needs and the oficial module.

1. Cool guided tutorial
2. Oficial module
3. Github example

I have done what you wanted and can say it pretty much works for my use case =)