Maybe I am missing something, but other than providing the water heater with 240v power I don’t think it will be a big deal. You may have to get the electric run to it. I already had electric, but I replaced it with a 50 gal Rheem from Home Depot. Was like $530~. Electric bill doesn’t seem too crazy and it’s actually a great heater. I just got a $16k quote on my chimney and they said it’s unusable so I feel your pain. I’m lining it myself now haha. Good luck!