Correct, dryer is $100 more plus $185 to convert to propane. No delivery since the development is in a propane farm.There are some holes in your calculations
A propane dryer is hundreds $$$ more and it's at a low use secondary house.
Usually about +100$ for gas model and the additional propane conversion cost.
propane dryer uses 600-800w of power + propane
Propane delivery fee.
Versus, $300 minimum to add a 220V dryer outlet.