Below are some generalizations about locations and ongoing maintenance costs: Older properties require more maintenance than newer properties.Composition roofs require more maintenance than tile roofs.Properties in climates with hard freezes require more maintenance than properties in milder climates.Properties in locations with a lot of moisture require more maintenance than properties in dryer climates.Wood siding requires more maintenance than aluminum or stucco siding.Properties with lush vegetation require more maintenance than properties with little or no vegetation.SummaryUsing the above criteria and considerations, I believe you will be able to narrow your focus to a small set of cities.

.• Properties with lush vegetation require more maintenance than properties with little or no vegetation.When you look at the maintenance elements in a residential property you can generally divide the elements into two groups: systems and the structure.• Systems include HVAC, water heater, plumbing and wiring.

Because if it is, riddle me how in SD and ND we pop out dinosaur fossils left right and center, of how lush, green AND TROPICAL it was, and paleontologists will say "Oh, it was a lush jungle because the median temperatures were so much higher than today".   

Originally posted by @Seattle Eltons:I too was intrigued by this when I saw the video by Michael Lush so I started looking into it.