If you are using fossil fuels, understand the safety risks and be sure the install is 100% compliant with codes, including the spread from propane exhaust to an open window. Pure electric tends to be carefree. Propane, white gas,, butane all introduce carbon monoxide, the silent killer. Be forever careful, follow every code, be diligent. Commercial RVs follow the regulations, if you rob an RV for cheap appliances, be sure to not lose that compliance when you reinstall it.