100% financing is not widely available, except with a USDA mortgage. Those mortgages are available in Rural areas and not every home. If you find a home you need to have your agent check with the mortgage loan officer to see if the home qualifies, it sometime come down to the specific address of the home.
As for the Wells Fargo loan, this is the information on their web site. Not all borrowers qualify and if history is any indication, they are not made very often. The the information below and there may be income limits as well.
Reduced down payment options.
Flexible income, credit and debt guidelines.
Flexibility on the source of closing costs.
Benefits for public employees (e.g. law enforcement officers, state licensed teachers, healthcare workers).
Minimal out-of-pocket expense.
Reduced mortgage insurance coverage needed.
Lender paid mortgage insurance option that allows more purchasing power and lower payments.
Increased chances to qualify by allowing limited or less-than-perfect credit histories.
A temporary buydown feature to help take advantage of lower initial monthly payments for up to three years.
Only available with a conforming fixed rate mortgage or a 5/1 adjustable rate mortgage (ARM).1
Available for owner-occupied primary residences only.
Income limits may apply.
Lender-paid private mortgage insurance will result in a loan with a higher interest rate.
Temporary buydowns are not available on all loans or in all areas.