It's WAY easier clean up outside, hose it off.I just run a hose from my hot water, don't have to worry about water all over the place. My back patio is covered, in the winter just sit a little closer to the propane burner,of course the winters here in western Oregon are not that cold just rainy,keeps everything green.
I used to brew inside, never again. outside is the best! You can just put all the equptment in the driveway, bust out the hose and make a huge mess. Great on hot days its like a beer equiptment swimming pool?