I've been wanting to build something like this for a while. I come from the Texas gulf coast, and I've been feeling a little homesick for wide flat wetlands and fried shimp.
The land came up for auction, and I won it. A friend of mine really enjoys underwater spaces, which will be the next addition.
For now, it's a fishing shack and dock. Come on down. Bring yer fishin' pole. Try here: http://slurl.com/secondlife/Valeyard/101/47/24 UPDATE: Valeyard is no more.
I wanted to create a little bit of narrative, so there's a solar collector on the roof, hooked to a car battery, and subsequently to a power inverter and then the lights.
Main building was done in a day and a half. Some texture tweaking over another day, spread out, and some custom coding for another couple days, spread out. The shadow under the shelter dissipates as the sun goes down, and reappears when the sun rises. The lights light up at night, and bugs start swarming them. And also there's a water-lapping sound embedded in the build, which can be switched on and off if you know where to click.