Thank you for your question.
I would highly recommend that you give serious consideration to cancelling your trip and proceed with the application.
If your wife was asked to sign a voluntary removal notice, this will cause her delays when applying for an entry permit to return to the UK.
I would therefore suggest that you consider submitting a new application.
Under the EU rules on residence there is no specific income or level of NICs to be paid. You must show that you are registered as a self-employed person with HMRC. You should include copies of all documents relating to your tax and NIC affairs to show you are exempted.
I hope this answers your question. Please don't forget to click accept. Thank you.
DISCLAIMER: Answers from Experts on JustAnswer are not substitutes for the advice of an attorney. JustAnswer is a public forum and questions and responses are not private or confidential or protected by the attorney-client privilege. The Expert above is not your attorney, and the response above is not legal advice. You should not read this response to propose specific action or address specific circumstances, but only to give you a sense of general principles of law that might affect the situation you describe. Application of these general principles to particular circumstances must be done by a lawyer who has spoken with you in confidence, learned all relevant information, and explored various options. Before acting on these general principles, you should hire a lawyer licensed to practice law in the jurisdiction to which your question pertains.
The responses above are from individual Experts, not JustAnswer. The site and services are provided “as is”. To view the verified credential of an Expert, click on the “Verified” symbol in the Expert’s profile. This site is not for emergency questions which should be directed immediately by telephone or in-person to qualified professionals. Please carefully read the Terms of Service (last updated February 8, 2012).