difference in 100yr vs 500yr flood plain insurance for Texas

[Chris Patrick]

Does anyone own properties in the 100 year or 500 year flood plains in Houston?  If not Houston, I'm also curious about San Antonio and Texas in general.

It would be very helpful to hear your specific property example with premium costs as well as the general % of price difference between those two categories in order to know if I absolutely must rule out some rental properties.

Thanks!