Lexie hates the water! Haha we have tried...
Those area live oaks in the front yard. They are fantastic trees. They are evergreens and the leaves fall off in the spring when new growth pushes them off.
Yeah down south the houses are priced lower, I think it is due to the fact we have so much land available to us. Lots of other reason I won't go into.
It s all about location just like in any other city. The closer you are to downtown, the higher the price. But in Texas, buying a home 23 miles from downtown is not uncommon. Houston does not have just one downtown, we have several.
BTW a NEW 3700 sqft home will run you $345k-$400k. You can buy this house in a master planned community with a town center for shopping, lakes, bridges, pools, work out center included! I watch the home and garden show as well and my jaw drops when I see a 2200sqft home going for $400k! And that house is 15 years old! 
Mike
Aha - live oaks. They are like our regular oaks, then, because our oak leaves turn brown, but stay on all winter, and the new leaves finally push the old dead leaves off.
You would never get that good a deal around here - 3700 sq ft for $345K-$400k. I would feel like I was living in a mansion if I lived in your house!