These things are popular in tourist areas. Even our city doesn't have something like this and its twice the size of yours.
Your trying to cater to everyone and its a recipe for disaster imo. It's like a band that tries to appeal to everyone by doing country, metal, classical and jazz... Instead, specialize in something and focus on that.
Based upon my experience, I would advise that seeking $5 million for a project which is in the very early formation stages is likely to be very challenging. Consider what you can accomplish with a somewhat smaller amount that will move the project forward and allow you to increase the valuation to the point where you can ultimately "command' the full $5 million.