I've always been curious about this. Calculating the long run cost of flood insurance vs. building the home on an elevated concrete platform, which would be ch

I've always been curious about this. Calculating the long run cost of flood insurance vs. building the home on an elevated concrete platform, which would be cheaper in the long run and which would add more resale value to the home? I've also seen homes retrofitted with raised platforms but have no idea how much that costs.