Looks like my kinda place!
The roof is newly refurbished tho.
That actually doesn’t look that unreasonable. The biggest mistake was when the city/county allowed the house to be built in the first place. But a growing tax base is important today-the future is someone else’s problem. As for not allowing the homeowner to build barriers to the flooding there are 2 reasons: it won’t work and it increases the flooding experienced by everyone else. It has been tried in many places. The best way to deal with this is to have the city participate in the FEMA program to buy the house and tear it down. $3-400K is a lot, but still cheaper than paying out repeated flood claims. But there is a lot of demand for that program and not much money, so it will take a few years. We will be seeing lots more of these cases in coming years. If you don’t have flood insurance, get it. No matter where you live. And check how long your community has participated in the FEMA flood insurance program. If it isn’t several decades, but concerned, probably be very concerned. FEMA is notoriously lax in enforcing their rules, but some communities are so blind they don’t even want to try. That is a bad sign.
I must be missing something. what do you mean by topography?
unless you are building in the shape of an unfolded tesseract, geometry doesn’t come into it. But topography is crucial in any building plan. Or I am missing something. 
It says “Cooling: No Data”.
That seems inaccurate, based on the photos.
Topology doesn’t come into it, but topography does.