Since you're not using the income from your side-business to qualify for the loan, it's really none of THEIR business.
Why are you dealing with Wells Fargo? There are lots of places to get loans.
Agreed. If it helps, our FHA lender didn’t ask where we got our down payment. We sold several large ticket items we had and we’ve saved this year. They’ve never questioned where it came from. Switching lenders may be good advice.