I know this not to be true, I would not have asked the question otherwise.
This information comes from the USCIS, and bullet 2 clearly states that I can use my income. It just doesn't tell me how to prove it will continue from the same source, hence my question as I was hoping someone here knows. Technically my wife is still the sponsor, she can just use my income to meet the requirement as I am her spouse and my income will continue from the same source.