Not sure if you meant "cleaning house" literally or metaphorically, but it sounds like all y'all have been derelict in dealing with your grandfather's estate.
I am not close with most of my siblings. I just found out about the house recently. Brother hasn’t worked on it for a few years. Just starting to.
At the moment, it sounds like you don't own anything other than a contingent right in your grandfather's estate. You certainly could offer to sell that right to one or more of your siblings, but we obviously have no way of knowing if any or all of them would be interested or whether they'd be willing to pay a price you'd be willing to accept.
You need to confer with a local bankruptcy attorney. When you do, make sure you have a copy of your grandfather's will and any documents relating to the proceedings with the probate court (if probate has even been filed, which isn't clear). Since you didn't answer a lot of the questions that I and others asked (because it sounds like you don't know the answers), we are very limited in terms of what we can tell you.