Start with a lightweight, easily transportable aluminum frame (think lager, sturdier aluminum bike frames) that can be used to construct a large cube or perhaps a half cylinder shape that is slightly larger than the entire volume of the house. If a team of firefighters were trained to build this, then they might be able build it in a manner of a half hour tops.

Next, they would need to have a large lightweight aluminum mesh that is big enough to drape over the entire aluminum frame structure, like an oversized tent. Finally, they spray the mesh down with either sandy water (naturally abundant in SD) from a high powered tanker truck or they drop that pink flame retardant chemical onto the aluminum mesh.

The ultimate goal would be for the fire to move on past that house unharmed. Of course, this would require many teams of firefighters each taking a house and building this kind of structure though, but I'll bet that the cost of the aluminum is cheaper than rebuilding a house, plus it would prevent hazardous chemicals from being released into the atmosphere.... that is, if this idea works.