We live on the Texas Gulf coast, and are in the market for a greenhouse kit.
I've read with interest the recent greenhouse thread, and checked out the
sites mentioned.

Scottie,

If you live near the Gulf coast of Texas you may have certain building code
requirements that might extend to building of greenhouses. A number of the
building codes have changed over the past several years due to the many
huricanes that have hit the area.

Check with your local Building Inspector prior to ordering any type of kit.
Once you have the information make sure that the manufacturer meets the
requirements for your area.