I see that DCF filing may be preferable to K-3 filing if the embassy in that country allows for a non-resident US citizen to file. Would the visa process be complicated if using a co-sponsor for the 1-130 to the point of rendering the visa application excluded from DCF?
Just an idea I am mulling around. My fella wants to return to Denmark and I see that DCF is allowed by a non-resident US citizen. The process seems so much more preferable than the others, especially as it would leave him clear to seek employment upon entering the US.
I know I keep switching the scenarios... Thanks for putting up with me

 

Sure. The links are as follows:
http://www.visajourney.com/forums/index.php?pg=dcf
and http://www.visajourney.com/forums/index.php?pg=compare

DCF stands for Direct Consular Filing where you complete the visa process from the consulate abroad rather than go through the US CIS offices. Everything I have read hints that DCF is much faster. The issue is that it is usually the avenue for a couple living abroad. It is up to the individual consulates to determine whether they will or will not accept filings from non-resident US citizens (meaning the US citizen lives in the US and foreign spouse in the country where the DCF is filed). There is no rule that says they must allow it, nor is there a rule stating they will not. It's done merely as a courtesy to the US citizen. If it's something you are interested in, you should contact the consulate and see what their policy is.
I wish I could give you more info, but I'm certainly not the one who is most knowledgeable on the board. Good luck in your endeavors. After reading the multitude of processes, I think we all need it.