The first and foremost question is why do you want to start a freelance marketplace?
What need can you solve which Fiverr, Upwork or Guru aren't solving?
What differentiates you from any of those platforms?
Without any of those answers, you could end up wasting your money buying the clone, however little it might be.

If you have a specific niche in mind or a specific requirement you want to fulfil, will the clone do the job to test your hypothesis? The purpose of the clone can be as a basic MVP to test your hypothesis, and once validated and the learnings gained from the test, you can then go the next step, add some customization into your custom product.