I want to know that what should be the 'minimum' property price
appreciation potential per year for residential resort property in
order to qualify for its  'venture capital for mortgage loan'  for
investment?

Future appriciation may not happen for a varriety of reasons, so I
would think a probable appreciation potential of 12% would be
necessary to interest most venture capitalists unless some arrangement
protects the venture capital supplier from downside risk. This is
mostly guess work on my part.   Neil