Converting a propane dryer to natural gas?

[Paul Sandhu]

This is for a furnished rental house. It sleeps 8 guys at a time. More than likely there will be 16 guys in there, day shift and night shift. I have a regular washer and natural gas dryer in there, and there is a stacked washer/dryer combo too. The electric dryer in the stacked unit crapped out. I can buy a used stacked unit that runs on propane for $150.

How difficult and expensive is it to convert a propane stacked dryer to natural gas? Or would you leave it as a propane dryer and just run a propane line through the exterior wall and leave a conventional gas grill propane tank outside to provide gas for the dryer? My tenants are refinery contractors (welders, pipefitters, boilermakers, etc.) and are going to be here to work 12 hour shifts, eat, shower, do laundry, sleep, repeat for about 3 months.