I have enough savings to pay the down payment (family supporting me in this venture).

If someone says yes, with no data to support their claim, you're just going to believe them?

If he's a vet, I'm sure there are resources he has access to that others don't, in addition to the regular places for support (eg local church). 

In fact on average we consistently support a dozen or so coastal STR investors annually acquire and launch five star AirBnB's. - Pacific Wonderland.

Investment property requires 15% down minimumYou could also do a Second Home or Vacation Home loan. 10% down and your dti needs to be able to support it.

Financing and loan terms can be a critical component to supporting cash flow or incentive on multi unit or commercial properties..

You'll find a wealth of knowledge and support here to help you along your journey.

(If first support agent doesn't understand or says no, call again until you get someone who can help or give you a sufficient answer)If you're comfortable sharing your VRBO listing, lots of folks here are happy to offer tips and feedback to help improve your listings performance.Check out this thread about How to increase VRBO rankingsGood luck!

Support is not the best on Guesty, they have zero phone support, everything is via email. 

I have clients that go HML for a fixer upper and get 100% financing for the property and rehab and then they can rate and term refinance anytime, even after day 1, As long as the LTV is supported by the appraised value.