How does 'accepted' but not published paper look on my CV?
Submitting work to a conference, having that work accepted, and presenting that work at the conference has value, such accomplishments should appear on CVs.
Withdrawing an accepted work from a conference due to no funding shows lack of foresight, perhaps even disrespect (by wasting time), and likely shouldn't appear on CVs.
Seek other funding sources, e.g., the conference itself or a national funding body, perhaps ask your advisors for suggestions.
Whether you and co-authors pay yourselves depends on personal factors, e.g., can you afford to?