Please ask a mortgage lender. There are a lot of questions that would have to be answered first to see if there was a program(lending) that you qualify for.
Please ask your lender about USDA loans.
On a second (Vacation) home there is no program I know of with a 0 down payment right now.......unless you can convince a Seller who has no mortgage on the property to "carry back" (provide) ALL of the financing themselves and let you come in with no down....highly unlikely to find someone willing to do that.
Realistically.....the maximum you are likely to find on a 2nd home is 90% financing (10% Down) on a "conventional" loan...meaning qualifying with full income documentation and a decent credit score. Mike Stone, Broker in Los Angeles, CA 818-481-8555
There is however a loan that does allow 100% financing, thisloan in known as a "pledged asset loan". If you have non retirement savings or investments equal to a minimum of 20% of the purchase price (depending on the type of investment it may be more) , you can qualify for this type of loan without having to liquidate those accounts. This type of loan is not allowed in all states though. If you want more details about this type of loan or have any furthur questions please send me an E-mail at firstname.lastname@example.org
This question needs to be answered by a good mortgage provider. I do not know of any current programs that offer 100% financing, but these programs change all the time. Please contact me if you'd like a good lender referral.