Ugh that happened to me in October 2012, month after I bought the house. Guy from Downeast Energy showed up and did the inspection and said “I ain’t fillin that”…it was a little flaky and rusty for sure. I had a another vendor just fill it and went a couple of years before getting it replaced, I figured the home inspector didn’t bring it up and maybe it was OK. Eventually the company I use for furnace cleaning and service (Dean Hanscom in Gray, awesome guy) did a replacement tank for about a thousand bucks I think (circa 2015/2016). They sell those tanks at Home Depot so you can price one out yourself and maybe if you have a truck bring it to the basement and then pay someone to hook it up only, and then leave the old tank in the basement off to the side until you have some extra money to have it cut in half and hauled off. Good luck!