APark

Thank you. We both read that and were just wondering if there wete any other rules about joint sponsors that were talked about somewhere else we missed. 

Thank you all. 

My husband has submitted his i-864 and we are getting all of our financial stuff together.  Unfortunately because we both live abroad currently, we need a joint sponsor. We have bout 75% of the required assets but not quite enough. Although usually family is the obvious choice, it is complicated and we do not want to ask. One person has already backed out- very suddenly and left us in the lurch. A very close friend has volunteered and is getting everything ready.
BUT she wants to know if after I arrive and get a job that meets the income standard, is it possible to have her taken off as joint sponsor. I have not been able to find anything on this. Can anyone help?  

 Thanks to all for your continued support!

Thanks everyone! 

I am trying to decide one more thing that maybe you guys can help with. 
Our wedding certificate is in Japanese, and I translated it and had that notarized at the US Consulate in Japan. 
Our interview will be in Tokyo, so I don't think I need to have a certified translation, but my husband and I are going back and forth. Is it better to get the certified translation and air on the side of caution? 

My husband is British, I am a US Citizen. We have both been living in Japan for over 10 years, met here and have gotten married. We plan on moving back to the US together. 

The i-130 was recently approved and now we are looking at financial documents, i-864. For reasons that are complicated and I would rather not get into, we prefer not to ask my parents to be a joint sponsor. I am getting a bit confused about who can be a joint sponsor. As we do not live in the states, and have no "household members," an incredibly close family friend has volunteered to do it. Is this permitted? I thought I found information stating that it was, and now I cannot find it. ( so I am panicking a little...)  
Any help would be greatly appreciated!