It is medium price, if you are experienced.first you should be certified
For LP ,second you need an LP kit and knowledge of L P and lastly if you are not familiar with LP/ gas conversion you really should get a qualified tech experienced in
Conversion to do it. So to summarize it can be expensive if unqualified and also dangerous
I have done dozens over the years and am licensed through state of Texas for repair/ installation you need to check state regulations
On installation requirements and licensing