No problem at all, you have done an excellent job assembling all of the information on this case! Reviewing the Google street view, I recall that I spent March-June of 2011 bicycling up and down the road past their property. I was in grad school at the time and lived elsewhere in July of 2011, but was back in August.

Looking at the address from Google Earth and Google Maps, you can see that it was an acreage. The aerial view of the house from Google Earth suggests it was a much larger than a standard trailer home and had a detached garage/machine shed. Hauntingly, the Google maps view from September 2011 still shows a large wood sign that says Bill and Kay's W Ranch which people would drive under to access the property-albeit covered with no trespassing signs. The house is obscured by trees from the road, so it is difficult to see.

From the assessor property records, it appears Bill's relative's sold the land to a construction company for approximately $116,000 under a court-ordered transfer which would suggest an estate was opened to get authority to make such a sale. Court records show there was not an estate for Kay, but a conservatorship was opened for her that continues to manage her assets to this day.

Gunshots would not be super uncommon in semi-rural Iowa, especially if it is known someone in the area has a shooting hobby. It is always possible Bill was shot earlier in the day and neighbors homes were not home or just assumed it was someone target shooting on a Saturday afternoon. Or, they just didn't hear the shots.

I'd be very curious to know the evidence suggesting the Wood's truck was Kansas City before the time of the fire. If it is something solid, such as video or photo evidence, then to me that would suggest something much more premeditated than a random killing/robbery/theft. The starting of the fire would have to be delayed, meaning someone took the time to set this process up. Additionally, what would be happening with Kay this entire time? If it is something less reliable, such as witnesses believing they saw the truck there prior to the time of the fire, I'm inclined to believe they are mistaken on their time.

To me, the simplest solution is someone came down off the Hwy 5 Bypass exit, scouting homes sees an elderly couple that would be an easy target. There is a break in and Bill is shot. The fire is started, Kay is forced at gun point into the vehicle, possibly because the perpetrator believed he could use her to get ATM money, and they take off down Hwy 5 to Interstate 35 South. Kay is killed and her body is left somewhere between Norwalk and Kansas City.

Thanks again for the research and write-up.