Your online guided tour

I have some ideas about this.

First, I would writ write a script as though you were doing an actual tour, describing what the visitors would actually be seeing. First, the outside of the house, then the inside, room by room. 

Then you might add a historical overview, beginning when the RLDS bought land in Southern Iowa and built the town of Lamoni. 

Then add the history of the Railroads in the area and the Roads.

Then take videos, using any camera (your phone would probably be adequate). 

Then record the script, and add it to the video using any Movie Maker. 

Have fun!