Like others have said, solving the humidity issue correctly will allow you to use any floor you want. But getting rid of all humidity, especially in humid climates, is not cheap. Finding a flooring solution that is less sensitive to moisture is the more cost effective solution.
Vinyl plank is a great solution, because it has the right mix of moisture tolerance and livability. Unlike porcelain tile, it is softer to walk on, and looks more convincing in wood grain designs. It is also generally more cost effective. Vinyl plank made with virgin PVC is virtually waterproof, and won't expand or contract if it is exposed to moisture. There are also some really nice designs available now, in larger plank formats. Take a look at Modin vinyl plank, which comes in a 9" x 60" plank and has a 4-sided bevel, as well as an industry-leading 40 mil wear-layer:
http://www.flooret.com/modin-vinyl-plank-flooring/
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Noce sample we brought
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