Any ideas how long? > K-1 Fiance Visas processing time?

[cat8dat]

Trying to figure out how best to make the timing in an application for K-1 Fiance Visa to correspond with the end of someone's job. Any ideas about timing? Any experiences or stories about experiences that could be helpful? Thank you so much.

Also, how hard is it to obtain an advance parole ability to leave the country- to finish one's job for instance- and then return to continue the adjustment for permanent status? How long does it take to process for advanced parole?

Thanks again for your time.
Best wishes!