It depends on which Enigma code and how much knowledge you know about the context of the message. Looking around, you can start with https://www.cryptool.org/en/cryptool2 :
> CrypTool 2 provides a variety of cryptanalytical tools to analyze or even break classical and modern ciphers. With the current version you can, for instance, apply a ciphertext-only attack on an Enigma-encrypted ciphertext
https://en.wikipedia.org/wiki/Cryptanalysis_of_the_Enigma#Si... points to http://www.tandf.co.uk/journals/pdf/papers/ucry_06.pdf from 10 years ago, which say that in about 6 weeks, "a total of ten breaks were achieved".
The WP page also refers to https://enigma.hoerenberg.com/index.php?cat=M4%2520Project%2... , which took 10 years to decrypt (calendar time, not CPU time). See https://enigma.hoerenberg.com/cms/download.php?cat=65_M4%20P... for details.
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Suppose that the Enigma Machine had never happened (but the rest of history somehow came out the same--any innovations that came directly from the Enigma or related work at Bletchley Park, etc, those innovations still happened, so all of our tech and history are the same, sans Enigma machine).
Now suppose that some organization (ISIS? USA? Anonymous? China? The Mafia? Russia? Whatever you like.) suddenly obtains enough Enigma machines (they have wifi now instead of whatever they had before) to carry out all their sensitive communications.
Further suppose that you are a leader of some sort and your organization is in direct conflict with the Enigma-using organization. You can intercept the messages, but as of yet you are unable to read them. You must find a way to read those messages!
What are your first orders?
2. If results from #1 are high, prioritize stealing an Enigma.
3. If results from #1 are low, prioritize performing classical crypto work: interactive use of frequency analysis, etc.