You can tell what zone you are in by searching your address here. https://msc.fema.gov/portal/search The City of San Antonio looks like they allow for certain construction in the floodplain as long as it does not raise the water surface more than 6 inches,but the "no rise" applies to the floodway.

i know this is kind of an old thread, but just wanted to add a few things here: 1. yes you will have to go through permitting process. you will also register this as a SFH with the county.2. you will need to contact DMV to deregister this as a mobile home. 3. you will have to make sure you remove the Axel and the wheels  under the home and make preparations to fix the property to the foundation you already have. currently dealing with similar situation in GA, hence researched a bit to find out the process. 

I only needed to verify them and generally their conclusions, but there was no sense in reinventing the wheel from scratch. 

Essentially the reason I was successful in my first year of real estate was not reinventing any wheels.

The tenant pool, however, is about 5 miles wide and 1 inch deep. 

It certainly has my wheels turning.

However, we expect selling activity to normalize as rates inch their way down over the next year.

Your going to spin your wheels dealing with agents and wholesalers. 

The squeaky wheel gets fixed!

I try flushing the toilet to try to get the chain to hook on the inflow, but the chain is only bouncing up.. it would need to go 3 inches over to the side and up to be hooked.