I owe two people a large sum of money, lookin for options?

In my fathers will, I get first option to inherent the house on the terms that I pay $60,000 to each of my siblings (2/3 the value of the house). I don't have $120,000 to pay any time soon. What kind of options could be available to guarentee my siblings a pay out and maybe I could make payments like a mortgage?
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