US Immigration from Algeria

Ok so I need help deciding what to do. This is our situation. I, the sponsor, am currently making about $80,000 annually. I have been working since November 2018 but have not yet filed my taxes for 2019. I was a student before I became a full time RN, and therefore, all of my tax transcripts show less than $10,000. After all of my research, and questioning my visa agency and an immigration attorney, I pretty much know that I need a joint sponsor, despite making well over the poverty limit, due to low previous tax transcripts. However, I'm having a bit of a difficult time finding a joint sponsor and I am just waiting for my second fee to show "paid" and then I am ready to submit all of my paper work (minus the joint sponsor.) So I have a few questions...

1. If I submit all the required NVC documents (including employment letter and 6 months of pay stubs) without a joint sponsor, does the NVC have the power to hold our case until we submit proper income evidence? Or will they just tell me that I don't qualify and I need a joint sponsor, but our case will still move to the embassy for an interview and I will just have to provide the documentation there? I was told by RapidVisa that they will not move my case along to the Embassy without me showing that I can properly sponsor my husband, however everything I have come across here on VJ tells me that in fact it will be transferred to the embassy for interview and you will just need to provide more documents there.

2. If I do submit my documents to CEAC without a joint sponsor and they say I don't qualify but they schedule my husband's interview, will submitting the additional evidence (my tax transcripts from 2019 that I will have filed by then) at this time, delay our case? In other words, if I submit my tax transcripts for 2019 at the interview, do I have to then submit them online too? And would that cause our case to go into AP and cause a delay?

3. If I can't find a joint sponsor soon, is it better just to wait until mid February until I can submit my tax transcript from 2019?

Any help would be so greatly appreciated. I really don't want to wait almost 2 more months just so I can submit the tax transcripts. But then again, when my husband gets to his interview (God willing) I really don't want to have to deal with the stress of waiting a lot longer for the visa to be granted.