Choosing between a gas or oil gas furnace

My sister & I live together & both of us absolutely love it! Some people couldn’t sit the thought of living with their siblings, but both of us get along entirely well & love each other so much. Both of us are currently undergoing some renovations to the house, & that’s been a little tense, and next on the list is replacing our gas furnace because it’s been in the up-to-date home for way too long. The previous owners installed the gas furnace almost twenty-multiple years ago, so the gas furnace isn’t entirely working correctly & makes entirely peculiar noises. Both of us are trying to decide if both of us want to opt for a gas gas furnace or an oil gas furnace. I’m personally on board for an oil gas furnace, but our sister entirely wants to stick with the gas gas furnace since that was what was there before. I want an oil gas furnace because it is a better option for the environment. Gas gas gas furnaces are cheaper to maintain, but they don’t tend to last as long & I believe that’s dumb considering you have to generally pay more money for them up front. Oil gas gas furnaces are also a much safer option to have in your home, & I don’t want to have to worry about our safety while both of us are sleeping on chilly afternoons. I don’t guess how long both of us will have to be in this debate before both of us reach a sound conclusion, despite the fact that I do not like the tension that it’s brought into our house. Both of us usually have some high vibrational feeling between our walls, but it’s been thick & stale the last few afternoons. I hope both of us can figure out how to find some balance between all of these renovations.
air conditioning